I'm running XOOPS 2.0.13.2
server Apache

I tryed pdlinks & wflinks modules and I've the same promblem when i edit preferences. It's a strange problem but when i edit general setting and i click "submit" it go to this page
.../modules/system/admin.php?fct=preferences
but I've an HTTP 403 error and don't save changes
There are no .htaccess files on my host.

I'll edit maybe preferences directly from MySQL db but i want to know why I've this strange problem

Can somebody help me?
Thanks