You're the first that has problems, all other 539 people got it working (+ or - 1 or 2). I'm inclined to think your system is 'off' or that you think you did it all correctly, but actually didn't.
1st of all, make 100% sure you have the correct patch. Perhaps try the updated patch. The patch I used is 183.624.931 bytes big.
(another patch I have ends with 666 bytes, but I didn't test that one).
Install your euro copy of AOW-HT and patch it with... the patch.
Then and ONLY then, replace the original patched euro ActOfWar_HighTreason.exe file for the file from the archive I provided.
Perhaps even replace AOW_HT_Editor.exe with the same (but renamed) file.
(just to root out all files that are using Tages as a protection).
If this really doesn't work then try looking at your drivers and perhaps your hardware (you probably should skip this game on a TNT2).
If nothing draws your attention... chances are your Windows is fouled up. Happened to me several times, stuff just didn't work until I re-installed (read: put back a ghost).
Hope this helps... it's really the BEST GAME EVERRR!!
