Debian installation: monitor/videocard problem

[Liudmila Yafremava <liudmila@spine.npa.uiuc.edu>]

Hi!

I am trying to install Debian on my computer, but it does not seem to
configure my monitor/videocard appropriately. When I startx from command
prompt, it says " (EE) Vesa(0): no matching modes. Mode screens found, but
none have a usable configuration. Fatal server error: no screens found."
What does it mean? How can I fix it?

thanks,
Luda