unwanted pulling to right during taxi.

Yep...I'm back Mr. Fozzer. Complete with a question that I saw someone else have in the past.Problem is,I don't remember where I saw it.I had this problem before and solved it.But stupidity entered,and I didn't copy my solution down. the problem is this.Everything worked fine.THEN,I packed my computer and moved.Set the computer back up and all of my ac want to pull to the right during taxi n take off.The method of pressing the #5 to recenter the rudder and trims doesn't solve this issue.It may be a steering problem rather than rudder steering.Any solutions or advice folks? Thanks in advance.