win98 OpenGL freezes( hangs) but was fine in win95

Hello… this has got me confused…with win95 and my video card (nvidiaTNT2.64) everything worked fantastic… i have not changed anything accept i reformatted and installed win98…now… i can’t run any games in OPenGL mode at all…the only one that even thinks about running is half-life… which i can hear the music playing but the screen and computer freezes… i have installed the latest nvidia drivers and have had directx7 installed (with win95 too, with no problems) but now… i cant do anything… i tried the “dva=0” that was posted elsewhere…but i got the " your vid card doesnt support this mode" when i tried that… so i removed that line form the win.ini file…so i am now stumped as what to do…i dont want to go back to win95 cause i like everything else in win98… but i want my games to work in opengl mode too… thanx for the help…