I reinstaled the compiler, and I pached (what i already a few moths ago did) again and I got the same results.

Then I removed everthing and instaled the compiler again, now without the patch. It's ok now.
There must be a problem in the patch.
I copied all the data of the 16F676 of the non patch. Than I patched again and put the "old" data of the 16F676 back. It still works.

Thanks for the hint.
Mat