Use the following command to verify that the sdm.tar file is in flash RAM:
Router# show flash:
The result of this command should include the sdm.tar file if the full version of Cisco SDM is loaded on the flash memory.
If sdm.tar is present in flash RAM, go to step 2.
If the result of this command shows the following files, Cisco SDM Express is in the flash memory, so skip step 2 and go to procedure 2 for the Cisco IOS Software upgrade.
home.shtml
sdmconfig-.cfg
home.tar
es.tar
common.tar
wlanui.tar (this file is available only if WLAN application is available on the router)
Go to below link to download the Cisco IOS software.
http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml
Here is the URL for the Cisco Router and Security Device Manager Quick Start Guide
http://www.cisco.com/en/US/products/sw/secursw/ps5318/products_quick_start09186a0080511c89.html