Sorry to hear that your are getting these different errors when trying to stream from your Slingbox 500. It is possible the reset did not go through on your Slingbox. You will need to perform a hard reset, and setup your Slingbox once more. I will provide a link below on how to perform a hard reset.
Once your Slingbox has been setup, please let me know if you are still getting these error codes. I will need to know on what device you get the error. If you are still having issues with accessing your recordings as well, please make sure to provide the make and model of your cable box to better assist you.
Sling Media Moderation Team