AMENDMENT TO EXTENSION OPTION AGREEMENT

Exhibit 10.4

AMENDMENT TO EXTENSION OPTION AGREEMENT

The parties to this Amendment to Extension Option Agreement are Rock Energy Resources, Inc. f/k/a Hanover Gold Company, Inc., Santa Maria Pacific, LLC, Gitte-Ten, LLC d/b/a Phoenix Energy, LLC, NW Casmalia Properties, LLC and Orcutt Properties, LLC (“Amendment Agreement”).  This Amendment Agreement is entered into effective as of June 30, 2008.

R E C I T A L S:

WHEREAS, an Extension Option Agreement, dated effective April 14, 2008, was entered into by Rock Energy Resources, Inc. f/k/a Hanover Gold Company, Inc., Santa Maria Pacific, LLC, Gitte-Ten, LLC, NW Casmalia Properties, LLC, Phoenix Energy, LLC and Orcutt Properties, LLC (“Extension Option Agreement”);

WHEREAS , as of March 31, 2008, Gitte-Ten, LLC and Phoenix Energy, LLC merged with Gitte-Ten, LLC being the surviving company; and

WHEREAS , the parties desire to amend the Extension Option Agreement as set forth herein.