Here is a note from the Mentor Graphics SupportNet site. (I work for
Mentor.)
Michael Holley
www.swtpc.com/mholley
Adobe Acrobat Reader 6.0 Issue
There is a bug within Acrobat 6 which causes SupportNet incompatibility.
This issue was identified by Adobe as a known issue with the Acrobat Reader
6.0. This version of the reader is not capable of handling the HTTP headers
generated by the SupportNet security system.
Solution 1: Save the PDF file to your hard drive, and open it in Adobe
Acrobat or Adobe Reader.
1. Right-click the link to the PDF file on the Web site, and then choose
Save Target As (Internet Explorer) or Save Link As (Netscape Navigator) from
the pop-up menu.
2. In the Save As dialog box, select a location on the hard disk, and
then click Save.
3. Double-click the PDF file to open it in Adobe Acrobat or Adobe Reader.
Solution 2: Disable Web Browser Integration.
1. In Acrobat or Adobe Reader, choose Edit > Preferences > Internet.
2. Deselect Display PDF in Browser, and then click OK.
Solution 3: Use Acrobat 5.x.
Remove Acrobat 6.0 or Adobe Reader 6.0, and then install Acrobat 5.x. You
can download the free Acrobat Reader 5.1 from the Adobe Web site at
www.adobe.com/products/acrobat/alternate.html