I've posted this in the German board but hope to get an answer faster here. A couple of days ago I reinstalled Professional x86, version 6.92.6 on my PC (Tevii S470 card). I updated the transponder list and scanned the channels. To my surprise I lost really many free German channels like Pro7, Sat1, Kabel 1, also some others like Puls Austria (they have lots of sports). Since then I have tried out many things: installation of numerous older versions, new transponder updates, several rescans, automatic and manual.
What I am facing is the following: There is no signal for the channels mentioned above (I know from my father's installation that they are still on air and still for free ). So when I scan and there are other channels on that same transponder, the other channels show up but my channels are missing in the list (e.g. 12.051 - V - 27500). Sometimes there is no channel at all found on a transponder (e.g. 12.545 - H - 22000). After an automatic scan this transponder is shown in the register card "not searched" in the window "search result" for the scan (there are about 40 transponders shown). When I do a manual scan, no signal is shown at that respective transponder.
Other than that everything is OK, e.g. my HD channels are all working OK, also some SD-channels.
I am a many-years-user of ProgDVB but right now I am out of ideas. Can anybody help?

Do you have any diseq device?
Try remove Modules\tevii.ebd2 file.

I used to have a 22kHz switch in the past but in the course of finding the problem I use direct connection. There is no tevii.ebd2 file in the Modules directory.There is a tevii.eBDA file but erasing that does not do anything. Since you mentiomed Tevii: I updated their driver from Jan 2011 to Nov 2011 (the last one known), but only after the problems occured and I have switched back to the driver from Jan 2011.
I even did two quick new installatios after your message because somtimes I install to a BDA compatible and somtimes to the Tevii. I tried both with and without the tevii.eBDA by manual scan on 12.545 - H -22000. No signal anywhere.
This effect is just so weird. The simplest of all have just disappeared from the world for me..

Can you install old version to other directory and test?

I just went back to long past times and installed 6.49.09 and 6.60.02 on another partition even. Still the same problem. No signal at 12.545 and others

... and I did more.
I took the Tevii card out of the computer, uninstalled the driver, made sure there was nothing left in the registry, got rid of all the half-working ProgDVB installations and began putting things together again. Tried out version 6.87.06 this time. Still all the same.
Shame on me: I even installed another viewing program (DVBDream). Same phenomenon there. No signal on "simple" channels like on 12.545 - H- 22000 and others. I am beginning to think that the solution, if ever one turns up, will be very embarrassing to me.

Solved for now. Got an early start today. The fact that the problem persisted with other TV applications indicated naturally that it was not a ProgDVB problem. So I started searching for failings of that transponder in the internet. Numerous suggestions (from interfering DECT phones to a frequency drift in the LNB). Tried all those out, but nothing helped.
Fortunately I have two of everything. In the end I reactivated an old computer with another Tevii card, installed the newest ProgDVB. All transponders deliver a signal now as they are expected to do. So it looks like my Tevii card is broken in a very special way, i.e. it does not work any longer on some transponders. Can that really be?
For now I don't care. I earned praise from my soccer fanatic sons for having solved a problem just in time.

May be cable not good?

I also have two dishes with two cables coming in
So I guess it is the card. I will just buy a new one and see

diseq?

none when testing the problem. I had a 22 Khz switch right before the card but took that out for testing

Sight wrote:switch right before the card

it was the mistake

The switch worked for years without problem. I bought a new TV card and everything is fine again.