I don't understand why !!!!! Arggggg It works great on Windows XP and Windows 2000 for my friends :-(.

Very strange problem.

Can you see please your Event Dairy (Journal d'evenement ou Observateur d'evenement) of Windows and look if there is an error according to Mql2Mq4 ?

And can you test these different versions to see if one of them works ?

http://yousky.free.fr/Mql2Mq4_0.3.zip
http://yousky.free.fr/Mql2Mq4_0.3.2.zip

Thanks, for your help, and appologize.
Hope it will works for you one day lol