What kind of graphic card do you have ?
- ATI
- Nvidia
- Internal chip (Intel, NVidia, ATI...)
An other cause can be that the vtk native layer might not be fully compatible with your linux.
We compiled it on a suse-10.1-64b.
Regards,
Seb
PS: If you know how to compile VTK, I can explain how to replace it in cassandra…