Server Error in '/' Application.

I have two POP-UP calenders on my webapplication and running well in my Desktop computer .I have launched same web application in Windows server2003(Network) and run with IP address when click the pop-up calender button following error occured
 
Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the curre ...