Meaning of ViewState is Invalid?cant decipher

[bujero]

Hi ppl<BR>Well i m trying to insert data in Access DB<BR>Sometimes it workss<BR>and some times i get this error<BR><BR>The View State is invalid for this page and might be corrupted. <BR>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. <BR><BR>Exception Details: System.Web.HttpException: The View State is invalid for this page and might be corrupted.<BR><BR><BR>what is the meaning of error?<BR>Dhiraj<BR>