Finaly I my graphic card works well and the problem was bad video driver
I installed driver (mart'06) and SU works fine

Thanks for sugestion.

Well I have windows XP SP2,and I already try with original ATI driver (dec'07) but not succesful

I have laptop (pentium M 1,7 ,1Gb DDR,ATI mobility radeon 9700 128mb/128bit) and in sketchup pro6 have bug in push/pull option,and cursor can't mark some surfaces and lines.
It's terrible to work in this great program but sketchup works perfectly on my desktop with the same file.
When I turn off hardware acceleration in sketchup everything works,but very slow.
I have new omega ati drivers for graphic card.
please help