soap4r Mysql::Error: MySQL server has gone away:

hi all

i m using soap4r concept for my application. and also different database for client application. in client application it works fine in the beginning but after when i keep my application idle, it throws error as Mysql::Error: MySQL server has gone away, while connecting to server database. do anyone know y this happens...

please..

thanks in advance.. if anyone knows please give some ideas..