Hi all

I solve my problem and Im posting the solution here just in case that someone might need it one day.

I had this in my admin files:

<script language="javascript" src="includes/menu.js"></script>

I change it with this in all my admin files
<script language="JavaScript" src="http://www.mydomain.com/shop/admin/includes/menu.js" type="text/JavaScript"></script>

where shop is my subdirectory.

Domain of my shop looks like:
http://shop.mydomain.com

Now it works. I did this also for all css and js files in head of all the .php files in admin directory. I didn't enter in subdirectories, no need to do this so far.

My guess is that the problem was caused because I place my shop under sub domain. I did this to not mess the shop with existing site, and I got another type of mess. Well, sometimes the mess is part of the job too...

Regards, Zoreli