mySQL Problem

Hi There.

I have a mySQL-problem - it appeared when trying
to install phpMyAdmin. The following error appears:
"MySQL Connection Failed: Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (111)". I checked that the sock
exists. I've even tried to delete it - where after mySQL
created it again. Nothing seems to help. I changed main
domain on the server - could that have affected anything?
Anyone got a clue of what might be wrong - and how
to fix it ?

// Thomas