PHP, since upgrading to 5.2.17 getting some warnings?

I can't reproduce this on my test server no idea why this is happening, other queries / functions work..

I'm getting this warning

PHP Warning:  mysql_connect() [<a href='function.mysql-connect'>
function.mysql-connect</a>]: Can't connect to MySQL server on 
'--my isps server--' (10060) in D:\domains\mydomain.com\wwwro开发者_C百科ot\p
hp\_stdfuncs.php on line 191

This function and others like it are having problems (but some are ok), this is my include file...

function AddPageError($PageHandle, $Requested) {

global $server;
global $db;
global $user;
global $pass;
global $sDebug;

$con = mysql_connect($server,$user,$pass);

I have an include file which sets those variables, as I say they work on other pages and functions..

No idea why ??

EDIT - phpMyAdmin warning

Your PHP MySQL library version 5.0.51a differs from your MySQL server 
version 5.1.42. This may cause unpredictable behavior.

The MySQL driver isn't enabled by default on 5.0->5.2, so most likely your new install didn't compile a new version for the 5.2 install, and is falling back to using the old 5.0 version.

Details here in the PHP docs