Sounds like https://community.sling.com/message/11930#11930
I had this problem and had to go back and forth from the UK to Norway a few times before I got everything working. Btw, the best tip I found in these forums is to hold down Ctrl and click on the video steam on your PC. That will pop up a window with lots of interesting information...
It seems that you are having some issues with your SlingCatcher units since you get the "SlingCatcher cannot connect to Slingbox due to a network error" error message.
This error means that you must check and adjust some settings at the Slingbox location (home network). The following article will provide you with the steps to follow:
Hope this helps!
I have this problem almost every week. The picture from the Slingcatcher freezes, you have to restart the Slingbox and then--network error. From the laptop also impossible to connect. I had this problem already last year, then my daughter had to go to my house in Europe to restart the Slingbox (cause I'm in China), now I have a better solution, a time-clock on the box, it is switched off and on every 24 hours .So when the error screen appears, I wait till the next day and can connect again after Slingbox restarted. (operating the remote too quikly gives the same, freezing,, disconnecting and error screen). A remote internet switch would solve this too, but much more expensive than a simple time device..