Cisco router command crypto isakmp invalid-spi-recovery not found

I m trying execute the comand  "crypto isakmp invalid-spi-recovery" on my cisco router 2600 version 12.3(22a).
In Cisco IOS Security Command Reference, Command History is writed: This command was introduced in release 12.3(2)T.
I would like to know why i can't execute this comand in my router?

There are this options:
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TRE-ES-ZE(config)#crypto isakmp ?
  aggressive-mode  Disable ISAKMP aggressive mode
  client           Set client configuration policy
  enable           Enable ISAKMP
  identity         Set the identity which ISAKMP will use
  keepalive        Set a keepalive interval for use with IOS peers
  key              Set pre-shared key for remote peer
  nat              Set a nat  keepalive interval for use with IOS peers
  peer             Set Peer Policy
  policy           Set policy for an ISAKMP protection suite
  profile          Define ISAKMP Profiles
  xauth            Set Extended Authentication values

Below show ver command
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TRE-ES-ZE#show ver
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IK9S-M), Version 12.3(22a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Fri 20-Jul-07 20:52 by hqluong
Image text-base: 0x80008098, data-base: 0x81CC6CC8

ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1)
ROM: C2600 Software (C2600-IS-M), Version 12.3(5a), RELEASE SOFTWARE (fc1)

TRE-ES-ZE uptime is 3 weeks, 4 days, 22 hours, 5 minutes
System returned to ROM by reload
System image file is "flash:c2600-ik9s-mz.123-22a.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
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agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
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cisco 2610XM (MPC860P) processor (revision 0x400) with 126976K/4096K bytes of memory.
Processor board ID JMX0803L5UN (993290961)
M860 processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
2 Serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
49152K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102Start Free Trial