Tnx MAxWafer
I had a look at the post but i don't speak German. So i translated the pages and as far as i understand the problem is the diseqc switch. I played with the settings and i found out the best settings for me. They don't solve the problem out but i have less error messages than before.
I changed the "DiSEqC repeats" to 3 and the most important the "Increased Voltage" to yes. Without the "Increased Voltage" set to yes there is no difference no matter what changes i am doing.
The only problem i have now is when i am changing channels from one sat to other very fast. Then i am getting the message. If the change is slow then no problem.