How do I debug this Datagrid?

[Aaron Ackerman]

I am having almost constant problems with these bound Datagrids in my VB.NET
Web Forms app.
I got one working just fine but this last one is just a killer. Right when I
pass back my dataset and call the update method (from doing an update on the
grid), it bombs with that rediculously generic SQL error (BIG HELP MS!!).

How do I debug this thing? I took all of the contraints off the table. I
made sure that I am sending back the exact same parameters (in the same
ordinal position) as to update as are in my select (same datatypes). I check
each item in the immediate window no nulls or odd data. I am putting the
name of the Dataset table in the update method: Dataset.Update(MyDataSet,
"MyTableName"), What gives???

You know if MS wants us to use these bound controls they are going to have
to make things a little more straight forward.