Thanks for using our forums! I'm sorry to hear you're having this issue. Are you able to view your recorded shows on your tv at home without a problem? Because it sounds like it could be an issue with your cable box itself, but if it is strictly an issue with the Slingbox streaming the content, I would advise trying a reset of the Slingbox. This will ensure that the Slingbox is up to date with the latest firmware.
Here is a link with instructions on resetting your Slingbox:
Hope this helps!
The Sling Moderation Team