I've installed SquawkBox and it correctly connects to the Radarbox port 30003 output, this is outputting correctly when viewed with telnet, and I can see the squawk codes that do appear in RB in the telnet window. SBSPlotter works correctly too, so that's another check.
SquawkBox just sits there displaying nothing at all. I set a filter with 0-7777, show, active and still nothing. I don't see many aircraft with squawk codes showing, but not a single one has appeared in the SquawkBox window. Squawk code look ups work OK.
Am I doing something wrong? I have Vista, and there are no error messages so the .NET framework is installed.
Puzzled!