ConnectionPool problem

I have the following problem.

I use ConnectionPool to access MySQL database. It uses static initializer to initialize connection. I'm tring to solve problem when the parameters for database are wrong, and the system can not access database.In that case the user should set new parameters, and the ConnectionPool should be initialized again, but when I start to access this ConnectionPool I always get an exceptlion "NoClassDefFound". Can anybody give me some suggestion how to solve this problem.

Thanks.

[524 byte] By [Zorana] at [2007-10-2 4:38:05]