Thanks for using our answers forums. Sorry to hear you are having issues using the virtual remote to view your Slingbox.
It sounds like it could be a few things that are happening. It could either be that the select button on the particular remote that you chose may not be functioning correctly. It also may be that something happened with the IR Blaster or mode that your cable box changes channels in at home may have changed. You can always try to program a different virtual remote or have someone check the mode of your cable box or the IR Blaster position at home. The articles listed below should help further.
The Sling Moderation Team