SDL initializing error under linux

hi guys. i’m sorroy if i bothered you…
i have a weird problem. when i try to run some of my SDL based apps, i get this error: "Couldn’t initialize SDL: No available video device"
i search the net from beginning to end but no success.
i use linux ubuntu 9.10. and i’ve compiled SDL 1.3
also i’ve installed my video card driver correctly. i’m sure it works fine, since i can run many graphical app easily.
even some of my SDL based apps work fine too, but as i mention some of them not; for example: Glest(game) or Blobwar(game) crash when they’re starting and give that ugly error.
plz help me guys

:frowning: [Wink]