Dataset Stored Procedure Return Value

I'm not sure if anybody else is having a problem with the Return Value of Stored Procedures where you get the "Specified cast not valid" error, but I think I found a "bug" in VS2005 that prevents you from having a return value other than Int64 datatype. I tried to look for the solution for myself on the forums but unfortunately I just couldn't find it. Hopefully, this will help out anyone who had come across the same problem.

Basically, I have a stored procedure that I wanted to call as an Update for my ObjectDataSource that returns a Money value. Everytime I do this, I keep getting that error saying "Specified cast not valid" even when I try to change the @RETURN_VALUE data type to Currency or Money. After a long session of eye gouging moments, I decided to look at the code for my dataset. There, I noticed that the ScalarCallRetval for my StoredProcedure query was still set to System.Int64. I changed it to System.Object and, like a miracle, everything works like its suppose to.

Ex. protected void SomeObjectDataSource_Updated(object sender, ObjectDataSourceStatusEventArgs e)

{GrandTotalLabel.Text = ((decimal)e.ReturnValue).ToString("C");

}