configuring video card<MSI ATI Radeon RX1550-TD256EH>

[f-thomas1 at hvcc.edu]

hey, 
i'm using the above card with a new install of freebsd 7.0. when i ran Xorg -configure the driver came back as "vesa". however after a couple of crashes, i suspect that it may not be good to leave it this way. i loaded the (ati) wrapper and got this: 
 
xauth:  creating new authority file /root/.serverauth.1474 
xauth: (argv):1:  bad display name "xxx.nycap.rr.com:0" in "list" command 
xauth: (stdin):1:  bad display name "xxx.nycap.rr.com:0" in "add" command 
 
 
X.Org X Server 1.4.0 
Release Date: 5 September 2007 
X Protocol Version 11, Revision 0 
Build Operating System: FreeBSD 7.0-RELEASE i386 
Current Operating System: FreeBSD xxx.nycap.rr.com 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 UTC 2008     root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 
Build Date: 13 February 2008  05:50:12PM 
 
 Before reporting problems, check http://wiki.x.org 
 to make sure that you have the latest version. 
Module Loader present 
Markers: (--) probed, (**) from config file, (==) default setting, 
 (++) from command line, (!!) notice, (II) informational, 
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown. 
(==) Log file: "/var/log/Xorg.0.log", Time: Fri Mar  6 16:45:21 2009 
(==) Using config file: "/etc/X11/xorg.conf" 
(WW) RADEON: No matching Device section for instance (BusID PCI:2:0:1) found 
(EE) No devices detected. 
 
Fatal server error: 
no screens found 
XIO:  fatal IO error 53 (Software caused connection abort) on X server ":0.0" 
 
      after 0 requests (0 known processed) with 0 events remaining. 
 
xauth: (argv):1:  bad display name "xxx.nycap.rr.com:0" in "remove" command 
 
now this is my first video card... and after reading the manpage for "radeon" the only thing which might help is: 
 
       The driver auto-detects all device information necessary to  initialize 
       the  card.   However, if you have problems with auto-detection, you can 
       specify: 
 
           VideoRam - in kilobytes 
           MemBase  - physical address of the linear framebuffer 
           IOBase   - physical address of the MMIO registers 
           ChipID   - PCI DEVICE ID 
 
okay, maybe i could write in the relevant info in xorg.conf, but other than VideoRam, i wouldn't know where to start. and i'm not even sure if the bloody card is supported since i didn't see it on the manpage... any help at all that's pertinent would be appreciated. thanks in advance.