problem with feeds on Eutelsat 7E

[marv0lo]

Hello,

I'm from eastern Poland.

I've got a TBS 6928SE card and 120cm satellite dish. The program I am using is DvbDream.

Unfortunately lot of feeds doesn't work for me. It says "Couldn't find a channel".

Satellite is set on transponder 11221 H 27500 with ~80% quality.

What I am doing wrong? Is my dish too small? Should I change transponder?
Change some settings in dvbdream?

Thanks for any ideas.

Cheers!