stupid mySQL connect \ pconnect problems - pls help

I am running the latest Apache2 and PHP 4.3.3 and mySQL 4... I have installed php as a module in apache. I cannot connect to the locally installed mySQL database. It complains that the server cannot be found .... I am doing the following $Conn = mysql_pconnect($Server, $User, $Pwd); I have tried setting $Server to be localhost, localhost:3306, the machine name, 127.0.0.1, all with the same results I have Norton AntiVirus and Internet Security 2003 installed, could this be the problem, if so what should I change ? I have had this all working (about 1 year ago) on older versions without problems, but it just does not want to work now. Any ideas please Thanks BOb