I have the same problem with W2K and ATI Radeon 7500.
When I run advcfg with the -log option, the log file ends like this:
svgalib: ioctl IOCTL_SVGALIB_MAP failed GetLasterror() = 31
os: signal 11
os: video_abort
os: close log
I have another machine with an old GeForce that didn't have this problem, win2k and worked fine.
SVGALIB is installed, if I run advcfg with it not installed I get an error message. However advmame will run with SVGALIB not installed, it just runs in a window, very small on the screen.