teletext in kdetv

Hi,

(Open)Suse10.1,  kdetv-0.8.8-14, zvbi-0.2.16-17, gcc-4.1.0-25
Terratec Cinergy 400 TV (saa7134) 

TV is OK but I have problem with kdetv/teletext:
when I click on "teletext" I see at first only the first line, for example:
"ZDF teletext ......."
after several seconds the kdetv-window becomes black and I cannot see anything(but sound is there)
when I click on "transparent teletext" I can see some (transparent) letters on black background or partly 
black letters on "transparent background" (unfortunately not the whole page, only several lines).
I downloaded then the latest kdetv (kdetv-0.8.8.tar.bz2 ) from kdetv.org and installed it but had the same problem. Then I tried  the kdetv (0.8.5  -rpm) from my old Suse9.3 (teletext under Suse9.3 was OK)- the same problem?!?. (zvbi-0.2.21 didn't help too)
I don't know what is the reason for that. Do anyone can help me?

Deyan