Problem: ObjectDataSource could not find a non-generic method 'Update' that has parameters: ...., original_Id.

Take steps:

1) Change ObjectDataSource :
OldValuesParameterFormatString="original_{0}"
to
OldValuesParameterFormatString="{0}"

2) Remove original_Id references from :

(a) update stored proc (if automatically generated),

(b) dataset (XSD)

other links:

http://geekswithblogs.net/chrishan/archive/2005/07/13/46223.aspx