playing in window mode

Hope someone can help
I play Ea madden but have it running in window mode

to do this in XP I used to just hit leftalt enter and it would switch from
full screen to window mode and hit it again and it would change back. but now
I hit those buttons and nothing happens.

I know that in msn alt enter would also make a new line without sending
message but in Vista it is Ctrl enter which I tried in the game but made no
differance.

Any Ideas

Thx
John