mysql_connect fails

I have a webserver which supports php.

I am trying to connecto to a Mysql server mysql.x.com which has no firewall and an acoount for the webserver.

When the mysql_connect is executed i received the Can't connect to MySQL server on mysql.x.com standard error.

mysql is up and it listens to 3306 port by default.

What is going on?

Can the owner of the webserver prohibit the mysql_connect to connect to any sql server?

#1 If server has PHP it doesn't mean anything about mysql

If you run Linux/Unix:
try to run these commands:
a).which mysql
b). rpm -qa | grep mysql
c). locate mysql
#2 How do you connect to Mysql?

Look the web server has all the libraries to get connected to a mysql server and it can connect to an 10.10... ip (private)

But not to my sql server which is a public ip

My sql server works great and the clients can see it except the webserver.

Is seems that webserver cannot see pulbic ips while it can receives requests from public ips (port 80)

the stantard error

Can't connect to MySQL server on ....(4)