Checking if your kit is complete... Looks good Writing Makefile for Win32::IEAutomation "Makefile out-of-date with respect to Makefile.PL" "Cleaning current config before rebuilding Makefile..." nmake -f Makefile.old Microsoft (R) Progr D:\cpanrun\build\5-6-1\bin\perl.exe "-Id:\cpanrun\build\5-6-1\lib" "-Id:\cpanrun\build\5-6-1\lib" Makefile.PL 8 [main] ? (508) D:\cygwin\bin\false.exe: *** fatal error - system shared memory version mismatch detected - 0x75BE0074/0x75BE0096. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. NMAKE : fatal error U1077: 'false' : return code '0x100' Stop.