Setup X problem

[jz]

Hi again,
I setup my XFree86-3.3.5 on my Redhat 6.0 but fail.
I choose the Trident Blade3D for my AGP Trident Blade3D card wiht 8Mb ram,
and configure the Monitor(PHILIPS 105G) by hand.
When I try to run my X with 
startx >/tmp/xerrors 2>&1,but only blackscreen.
At the end of the xerrors,it say:
Trident: BitBLT engine time-out.
what's BitBLT engine?
how to get my X run?

thanx

jiangzhi
            [EMAIL PROTECTED]