Using the following command you will have access to advanced user management dialogue which allows you to add,edit or delete the stored network credentials (Advanced Tab):
Control Userpasswords2

Reference: http://support.microsoft.com/kb/306992

1- Open your MySql client, e.g. SQLyog.

2- Run the following command to see how  many concurrent connections is MySql server currently allowing:
SHOW VARIABLES LIKE "max_connections";

3- Run the following command to increase the number of concurrent connections:
SET GLOBAL max_connections = 1000;

Check MySQl official page for more details.

 .