What's with the heavy mathematics? Why don't you just compare epoch times and be done with it.

$filename1 = "c:/progra~1/imms";             #file on the client (win 
+95/98).
$filename2 = "//bmc_1/imms_stock/imms_exe/imms.exe";    #file on serve
+r.

if ((stat($filename1))[10] < (stat($filename2))[10])
{
    print "$filename1 is old\n";
    copy ($filename2, $filename1) or die "copy failed: $!\n";
    print "$filename2 updated!\n";
}else{
    print "$filename2 is up to date!\n";
    print "No files copied!\n";
}
[download]

Of course, that's a little obfuscated. I would tend to write that as

sub file_age {
   (stat($_[0]))[10]; # return the epoch seconds since the file was cr
+eated
}

$filename1 = "c:/progra~1/imms";             #file on the client (win 
+95/98).
$filename2 = "//bmc_1/imms_stock/imms_exe/imms.exe";    #file on serve
+r.

if (file_age($filename1) < file_age($filename2)) {
    print "$filename1 is old\n";
    copy ($filename2, $filename1) or die "copy failed: $!\n";
    print "$filename2 updated!\n";
}else{
    print "$filename2 is up to date!\n";
    print "No files copied!\n";
}
[download]

--

g r i n d e r
just another bofh

print@_{sort keys %_},$/if%_=split//,'= & *a?b:e\f/h^h!j+n,o@o;r$s-t%t#u';