help me, incorrect version of precomp.exe

[mrcunbeo]

Hi guy,
i am stucking at extracting file
when i start extract, it(precomp) pops up: "incorret version of precomp.exe"
and then (ISDone.dll) says
"an error occured while unpacking: does not match checksum!
unarc.dll returend an error code : -12
error: file....
failed CRC check"

I am using win 7 - 32 bit
I used the compress method of : http://fileforums.com/showthread.php?t=96298
may this method not suitable for win 7 - 32 bit?
please help me
merry Christmas !