This Vista issue is driving me crazy. 
  
With all Vista users, I am getting a black screen pbss, and each player is using a different vid card.  
  
I personally use XP so I do not claim to have a firm understanding of Vista...  
  
BUT, If I understand it correctly, Vista is an operating system with a built-in firewall. 
  
As with all firewalls, data can be blocked or allowed. 
  
  
I guess my question is this .... 
  
What port needs to be openned before the pb screenshot will be permitted to transfer?