Newbie: Aircraft tracked 0

Good evening,

I was glad to get my DVBT-receiver today. I downloaded and installed the latest Windows-software with no problems. FR24 says this:

Flightradar24 Feeder/Decoder
Windows/generic/i386/1.0.15-7
Updated: 22:29:06 GMT+0100

FR24 Link: Connected via UDP
FR24 Radar Code: T-EDDS103
Aircraft Tracked (ModeS & ADS-B): 0
Aircraft Uploaded: N/A
Receiver: dvbt, Connected
MLAT running: N/A

It is running since several hours. "aircraft tracked:0" is the point which bothers me.

Any idea of helping a newbie? Thanks a lot.

edds103