Simrad AP 26 trouble

By rudder do you mean reference or rudder parms?

Last time I check my lo parms were something like:

rudder: 44
counter : 1.50
autotrim: 40
limit: 25

All of these depend on having your ruddder reference scaled correctly and zeroed.
 
Make sure you didnt put a piece of metal near your AP compass.
 
When I say rudder I mean when looking at my Simrad screen it has the heading, below that it says Rate-0, and below that it has "P" on one side "S" on the right and a number in the middle, shouldnt that number be set on 0...........this may be completely wrong but I always remebered it being 0 before and when I noticed the Auto-Pilot not holding I looked down and it was set on 23.....?