Trying to install X on top of Linux 2.1

[csager <csager@softcom.net>]

XF86Setup tells me "Congradulations, you now have a working
server" and returns me to the prompt.
But when I type:
startx
The following errors are printed to the screen:
======================================================

(--) SVGA: Revision 0
(--) SVGA: chipset: tvga8900cl
(--) SVGA: videoram: 1024K
(**) SVGA: clocks: 25.31  28.32  45.37  36.13  57.86  65.76
50.65  40.38
(**) SVGA: clocks: 88.43  98.89  119.43  109.22  72.34
77.61  80.79  75.97
(**) SVGA: using 8 bpp, Depth 8, Color weight: 666
(--) SVGA: maximum allowed dot-clock: 80,000 MHz
(--) SVGA: There is no mode definition named "640 X 480"

    Fatal Server Error
    No Valid Modes Found

_X11TransSocketUNIXConnect: Can't Connect: errno = 111
giving up.

xinit: Connection refused (errno111) unable to connect to X
server

xinit: No such process (errno 3): Server error.

======================================================

I've tried all combinations of color depth and display types
(600 X 800, 640 X 480 etc.)
I don't know what the verticl and Horizontal sync rates are
for an EverView monitor.
I'm using a Trident 8900 video card, and found it as a
selectable type in the setup (also selecting 1Meg memory).
Is there a package I missed?