What version of ArcGIS / ArcSDE are you using? Support for SQL is a new thing in 10 and extended in 10.1. It may be that the stored procedure you are trying to use does not exist in your geodatabase until a future upgrade to 10.1. Please note that an upgrade of an existing geodatabase is a separate operation from upgrading your client PC's ArcGIS for Desktop application. You may be running ArcGIS 10.1 locally, but still be connecting to a 10.0 or 9.3.1 geodatabase not having this stored procedure.
By the way, I would like to strongly discourage you to tamper with any of the stored procedures or geodatabase system tables using SQL. Unless you are a true expert geodatabase administrator, there is a high chance of wrecking your geodatabase.