Thanks for posting in the forums! I'm sorry to hear you are unable to get a video signal. Typically, when connecting from a hotel, the a bit rate is pretty low, due to other people connected to the same network.
I would recommend going to speedtest.net and testing your upload/download speed.
Below is a link to the bandwidth requirements for the Slingbox 500 so you know what you should be getting, compared to what the speed of the hotel is.
Hope this helps!
The Sling Moderation Team