Now, its working fine for most of the games.
In my case, all my files (chd, bin+cue, img, etc...) were not working through Mame.
But when I added MameUI64 to Mame, all the files worked. Dont know why
Anyway, I just have a problem with Prince of Persia. It boots, but ask a floppy Disk I think. I think I have the file (its a bin file) but Im unable to mount it in the disk
Thanks