**RESOLVED*** Newbie Post back problem

I have a form with 3 radio controls and a button, each radio has it's own sql string defined.
Data is always returned the first time I choose any option button, but the second time I post it returns a "page cannot be displayed error"
Thanks in advanced


Dim strConn as string ="PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=" & server.mappath("Database.mdb") & ";"
dim strSQL as string
Dim Conn as New OLEDBConnection(strConn)

Sub btnShowBugs_Click(sender As Object, e As EventArgs)

Call DisplayResults(strSQL)

End Sub


sub DisplayResults(SQLIN as string)
on error goto ErrorHandler
Dim Cmd as New OLEDBCommand(SQLIN,Conn)
Conn.Open()
Dim Rdr as OLEDBDataReader
Rdr=Cmd.ExecuteReader()
myDataGrid.DataSource = Rdr
myDataGrid.DataBind()
Rdr.close()
Conn.close()


ErrorHandler:
if err.number<>0 then
response.write (err.description)
end if



end sub



Sub rd_SQL_BUGID_CheckedChanged(sender As Object, e As EventArgs)
strSQL ="select BugId from Product order by BugId"
End Sub

Sub rd_SQL_PRODUCTNAME_CheckedChanged(sender As Object, e As EventArgs)
strSQL ="select ProductName from Product"
End Sub

Sub rd_SQL_ALL_CheckedChanged(sender As Object, e As EventArgs)
strSQL ="select * from Product order by BugId"
End Sub

Update:This seems to be the error.
System.Web.HttpException: The View State is invalid for this page and might be corrupted



RESOLVED: I turned EnableViewState to False on the DataGrid Control.