请问，在PDP激活时，同一个IMSI在同一个小区下多次发起激活。前一次可以正常激活，后一次却不行了。返回内容中有：
7.SMCause: 33 - Requested service option not subscribed

一直找不到原因。
是不是因为第一次激活以后没有detach，手机再次发起激活导致SGSN拒绝？

下面是PDP激活request的字段：
Frame 1: 127 bytes on wire (1016 bits), 127 bytes captured (1016 bits)
Arrival Time: Jan3, 2011 09:03:40.000000000 China Standard Time
Epoch Time: 1294016620.000000000 seconds
[Time delta from previous captured frame: 0.000000000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 0.000000000 seconds]
Frame Number: 1
Frame Length: 127 bytes (1016 bits)
Capture Length: 127 bytes (1016 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: raw:ip:udp:gprs-ns:bssgp:llcgprs:gsm_a_dtap:ipcp:ipcp:pap]
Raw packet data
No link information available
Internet Protocol, Src: 0.0.0.1 (0.0.0.1), Dst: 0.0.0.1 (0.0.0.1)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 127
Identification: 0x0000 (0)
Flags: 0x00
0... .... = Reserved bit: Not set
.0.. .... = Don't fragment: Not set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 62
Protocol: UDP (17)
Header checksum: 0x7c6d [correct]
[Good: True]
[Bad: False]
Source: 0.0.0.1 (0.0.0.1)
Destination: 0.0.0.1 (0.0.0.1)
User Datagram Protocol, Src Port: dnp-sec (19999), Dst Port: dnp-sec (19999)
Source port: dnp-sec (19999)
Destination port: dnp-sec (19999)
Length: 107
Checksum: 0x0000 (none)
[Good Checksum: False]
[Bad Checksum: False]
GPRS Network Service, PDU type: NS_UNITDATA, BVCI 10404
PDU type: NS_UNITDATA (00)
NS SDU Control bits: 00
.... ...0 = Request change flow: Not set
.... ..0. = Confirm change flow: Not set
0000 00.. = Spare bits: 0x00
BVCI: 10404
Base Station Subsystem GPRS Protocol
PDU Type: UL-UNITDATA (0x1)
TLLI: 0xd0cbb2d7
TLLI: 0xd0cbb2d7
QoS Profile
Peak bit rate: 524200 bits/s
..1. .... = C/R: The SDU does not contain command/response frame type
...1 .... = T: The SDU contains data
.... 0... = A: Radio interface uses RLC/MAC ARQfunctionality
.... .000 = Precedence: High priority (0)
Cell Identifier: RAI 460-00-26569-37, CI 10306
MCC: China (People's Republic of) (460)
MNC: 0
LAC: 26569
RAC: 37
CI: 0x2842
Alignment Octets (0 bytes)
LLC PDU
MS-SGSN LLC (Mobile Station - Serving GPRS Support Node Logical Link Control)SAPI: GPRS Mobility Management
FCS: 0x424524 (correct)
Address fieldSAPI: LLGMM
0... .... = Protocol Discriminator_bit: OK
.0.. .... = Command/Response bit: DownLink/UpLink = Response/Command
.... 0001 = SAPI: GPRS Mobility Management (1)
Unconfirmed Information format - UI, N(U) = 8
110. .... .... .... = UI format: 0x0006
...0 0... .... .... = Spare bits: 0x0000
.... .000 0010 00.. = N(U): 8
.... .... .... ..0. = E bit:non encrypted frame
.... .... .... ...1 = PM bit: FCS covers the frame header and information fields
GSM A-I/F DTAP - Activate PDP Context Request
Protocol Discriminator: GPRS session management messages
0... .... = TI flag: allocated by sender
.010 .... = TIO: 2
.... 1010 = Protocol discriminator: GPRS session management messages (10)
01.. .... = Sequence number: 1
DTAP GPRS Session Management Message Type: Activate PDP Context Request (0x41)
NSAPI: 0x07 (7)
0000 .... = Spare bit(s): 0
.... 0011 = LLC SAPI: SAPI 3 (3)
Quality Of Service - Requested QoS
Length: 12
00.. .... = Spare bit(s): 0
..00 0... = Quality of Service Delay class: Subscribed delay class (in MS to network direction) (0)
.... .000 = Reliability class: Subscribed delay class (in MS to network direction) (0)
0000 .... = Peak throughput: Subscribed peak throughput/reserved (0)
.... 0... = Spare bit(s): 0
.... .000 = Precedence class: Subscribed precedence/reserved (0)
000. .... = Spare bit(s): 0
...0 0000 = Mean throughput: Subscribed peak throughput/reserved (0)
000. .... = Traffic class: Subscribed traffic class/Reserved (0)
...0 0... = Delivery order: Subscribed traffic class/Reserved (0)
.... ..00 = Delivery of erroneous SDUs: Subscribed delivery of erroneous SDUs/Reserved (0)
Maximum SDU size: Subscribed maximum SDU size/reserved (0)
Maximum bitrate for uplink: Subscribed maximum bit rate for uplink/reserved (0)
Maximum bitrate for downlink: Subscribed maximum bit rate for downlink/reserved (0)
0000 .... = Residual Bit Error Rate (BER): Subscribed residual BER/Reserved (0)
.... 0000 = SDU error ratio: Subscribed SDU error ratio/Reserved (0)
0000 00.. = Transfer delay: Subscribed transfer delay/reserved (0)
.... ..00 = Traffic handling priority: Subscribed traffic handling priority/reserved (0)
Guaranteed bitrate for uplink: Subscribed guaranteed bit rate for uplink/reserved (0)
Guaranteed bitrate for downlink: Subscribed guaranteed bit rate for downlink/reserved (0)
000. .... = Spare bit(s): 0
...0 .... = Signalling indication: Not optimised for signalling traffic
.... 0000 = Source statistics description: unknown (0)
Packet Data Protocol Address - Requested PDP address
Length: 2
0000 .... = Spare bit(s): 0
.... 0001 = PDP type organization: IETF allocated address (1)
PDP type number: IPv4 address (33)
Dynamic addressing
Access Point Name
Element ID: 40
Length: 7
APN: uninet
Protocol Configuration Options
Element ID: 39
Length: 36
1... .... = Ext: 0x01
Configuration Protocol: PPP (0)
Protocol: IP Control Protocol (32801)
Length: 0x0a (10)
PPP IP Control Protocol
Code: Configuration Request (0x01)
Identifier: 0x46
Length: 10
Options: (6 bytes)
Primary DNS server IP address: 0.0.0.0
Protocol: IP Control Protocol (32801)
Length: 0x0a (10)
PPP IP Control Protocol
Code: Configuration Request (0x01)
Identifier: 0x47
Length: 10
Options: (6 bytes)
Secondary DNS server IP address: 0.0.0.0
Protocol: Password Authentication Protocol (49187)
Length: 0x06 (6)
PPP Password Authentication Protocol
Code: Authenticate-Request (0x01)
Identifier: 0x48
Length: 6
Data (2 bytes)
Peer ID length: 0 bytes
Peer-ID (0 bytes)