Have you tried the following?

• Try our Problem Solvers to help troubleshoot technical issues.
• Use our powerful search engine to search the Xilinx Answers Database. Xilinx Applications Engineers add to this knowledge base daily!
• Check the Service Pack Updates area to make sure your software is current.

If you still need to contact us:

• You can now open and manage your technical support issues online! Please use WebCase to submit your technical questions to the Xilinx hotline.