Copying ios to flash via serial

[whiteford]

I have just downloaded a new image to flash via a serial cable on a Cisco 837. The Download completed and then erazed the flash, but the checksum failed. Here is the output:

Expected checksum: 3d7a, calculated checksum:814

open: file "c837-k9o3y6-mz.124-5a.bin" not found

open(): open Error = -1

loadprog: error - on file open

Any ideas what to do next?

[whiteford]

Problem is I downloaded this a while ago and no longer have access to download from Cisco, anywhere else I can get one? This one is only about 8mb, I have a later version which is now too much for the age of my current 837.