DataContext Menu in C# application causing error

It's been a long time i used DataContext Menu to set up a C#. 2010 application, and I’m already getting an error message:
"Error 2 'RpcSupport.Attestations' does not contain a definition for 'Receive_Date' and no extension method 'Receive_Date' accepting a first argument of type 'Rp.Att' could be found (are you missing a using directive or an assembly reference?) C:RPAttes.aspx.cs 94 16 RpSup.
att.dbml using the designer, but it doesn't have the "Receive_Date" column in the extension methods.
Please help me figure out how to fix this.
