Which IOS is for Router 7606 to accept FWSM?

Question:

I need to put WS-C3560V2-24PS-S  a FWSM and a line card WS-X6148A-GE-TX to a router 7606. The FWSM version is 3.2(13). The router is running IOS 12.1(18)SXD3. The Cisco document here says the required IOS for router 7606 is 12.2(18)SXF or higher. I have downloaded the IOS 12.2(33)SRD4 and loaded it to the flash card. When I turn the router on, it doesn't load the new IOS and goes to rommon.

Can you advise which IOS I should use to make the router 7606 work and accept the FWSM.

Answer:

If the document said that the ios version must be 12.2(18)SXF or higher to support FWSM function.

Please follow the steps of ios upgradation inorder to get the router load with new ios image which you have already WS-C3560V2-48PS-S Price put in the flash.