Red/blue LED indicates that the openSPOT2 is trying to connect to the selected server, but it can't because there's a problem with the internet connection. This error can be caused if the router, network, or the internet service provider is using a proxy or some kind of traffic filtering which blocks the openSPOT2 from connecting.
http://manuals.sharkrf.com/openspot2/en/led-states.html#page-top