Thanks for posting to our Forums! I can understand the freezing you are getting with the Slingbox 500 while viewing can be frustrating. In this situation the first step I would do is verify that you are getting the correct speeds for viewing by going to SpeedTest.net. This web site will give you an average speed of you network to the hundredths place of a mega-byte. If you are getting the minimum Download and upload speeds required for viewing the Slingbox. I would next check into the article below.
Check this Article and video:
Hope this helps!
The Sling Media Moderation Team