Hi Anis.  I think you're posting to the wrong forum, the folks here aren't very familiar with PHD2.  If you post your question over here: Google Groups

 

and include your guide log, we'll probably be able to sort out your problem.  In the meantime, get on the latest release of PHD2 and read the help file regarding the Guiding Assistant and how to measure your Dec backlash.

Good luck,
Bruce W.