[Newbie]ATI Radeon 64MB DDR VIVO problems...HELP!

[Troy Frost]

I have been wrestling with this problem for quite some time now and I am totally clueless.  I've got an ATI Radeon 64MB DDR VIVO video card, and I'm trying to run Mandrake 8.0 with X.  I have no problem booting/running Linux but when I 'startx' I get a blank screen with no errors - my monitor appears to go into 'standby' when I try to run X - at which point I loose all control of my system and become unable to feed any commands to my OS.  I've tried just about every release of Xfree86 I could find (the most recent one being 4.1.0), none of which have solved this problem (even after configuring my X server with VERY modest settings).  I have no fancy configuration on my video card (I have only my monitor plugged connected to it, no special VIVO peripherals) and have had no problems whatsoever installing and running X on other computers on my LAN (all of which have less sophisticated hardware...fyi).  I'm somewhat new to Linux and I cannot find anything about this problem anywhere. Please Help!   ~Troy