Problems with FSUIPC 3.06 and Squawkbox 2.3 ?

Hello! I have a problem with FSUIPC 3.06 (not registered - yet ) and Squawkbox 2.3. I start SBRelay, then open FS9, run SBHost, and then connect to VATSIM via Squawkbox. Now I have the problem that when i try to send a transmission, i get a server automated message that i am on a wrong frequency (even if I am von 122.8, thats the Unicom if doesn't seem to work) and it also says to me that I have to download and install FSUIPC. But it's already installed..... The strange thing is that I can chat with anybody there on 122.8 but I don't see any other frequencies I can select, even if I am in a covered area like an airport with tower support. The second strange thing is that I see myself on the map at Whazzup (registered) but only at the departure airport also if I am enroute to a destination. I also can't see my flightplan at Whazzup. I am not sure if somebody could help me because I cannot say where the problem is. Thx Daniel