General Network Error Check network documentation

Hi I get a "General Network Error Check network documentation" error sometimes, but its only while insert or update statements are fired while selects keep working perfectly.

The Error details are as follows:

General network error. Check your network documentation.

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.Data.SqlClient.SqlException: General network error. Check your network documentation.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SqlException: General network error. Check your network documentation.]

System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream)

If once a update is fired from IDE it takes long to respond but once its done the error disappears.

Any body any Idea.