2610XM Flash Upgrade Failure

I've recently purchased three 32MB Flash SIMM's to upgrade my 2610XM routers and 2611XM router to 48MB total.  When I take out the 16MB chip and put the 32MB chip in, the router goes into rommon.  It says:

Checksum failed on c2600-adventerprisek9-mz.124-10c.bin

Expected checksum: f10f, calculated checksum: 3c65

open: file "c2600-adventerprisek9-mz.124-10c.bin" not found

open(): Open Error = -1

loadprog: error - on file open

boot: cannot load "flash:c2600-adventerprisek9-mz.124-10c.bin

 

I thought possible bad new memory, but all three?

Is there something I'm missing when upgrading internal flash?  Is it possibly an incompatible IOS with that memory, if that is a possibility or not?  

When I put the old chip back in everything boots fine.

 

I'm upgrading my memory so I can install the 12.4T version IOS with EIGRPv6 support.  

Thank you all......

 

Troy

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