STK doesn't startup since Natty

STK doesn't startup on a new installation of Natty (Ubuntu). On Maverick worked it all right, but that was the older (0.6) version, this should be 0.7. When I try to start it the screen is flashing 2-3 times and then it stops.
If I try it to start with the Terminal it says:
ann@ann-laptop:~$ supertuxkart
Irrlicht Engine version 1.7.2
Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686
[FileManager] Data files will be fetched from: '/usr/share/games/supertuxkart/'
[IrrDriver] Creating NULL device
Irrlicht Engine version 1.7.2
Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686
[IrrDriver] Trying OpenGL rendering.
[IrrDriver] Tring to create device with 32 bits
[IrrDriver Temp Logger] Level 2: GL_INVALID_ENUM
[IrrDriver Temp Logger] Level 2: Could not bind Texture
failure to revalidate BOs - badness
supertuxkart: ../../radeon/radeon_cs_gem.c:181: cs_gem_write_reloc: Controletest 'boi->space_accounted' faalt.
Afgebroken (=means stopped)
Can someone help me? I can't handle my children if it doesn't work...
Thanks,
Árpi
If I try it to start with the Terminal it says:
ann@ann-laptop:~$ supertuxkart
Irrlicht Engine version 1.7.2
Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686
[FileManager] Data files will be fetched from: '/usr/share/games/supertuxkart/'
[IrrDriver] Creating NULL device
Irrlicht Engine version 1.7.2
Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686
[IrrDriver] Trying OpenGL rendering.
[IrrDriver] Tring to create device with 32 bits
[IrrDriver Temp Logger] Level 2: GL_INVALID_ENUM
[IrrDriver Temp Logger] Level 2: Could not bind Texture
failure to revalidate BOs - badness
supertuxkart: ../../radeon/radeon_cs_gem.c:181: cs_gem_write_reloc: Controletest 'boi->space_accounted' faalt.
Afgebroken (=means stopped)
Can someone help me? I can't handle my children if it doesn't work...
Thanks,
Árpi