problems with my graphic card

hi! I’m trying textures in jogl with my pc and i’ve got a problem. At first time, the texture is shown ok, but if a reshape the window or a press any key (KeyEvents are correctly made) the texture disappear. My graphic card is a ATI RADEON 9200 and my pc is 256DDR RAM with 2600XP AMD.
In the other way, I have got another pc older, and then its works.

Do the JOGL demos work properly? For example the VertexProgRefract demo?