The request was aborted: The operation has timed out.

I am facing this error while using web service.
Can any one helps

The request was aborted: The operation has timed out. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.  Exception Details: System.Net.WebException: The request was aborted: The operation has timed out. Source Error: 
Line 329: [return: System.Xml.Serialization.XmlElementAttribute ...