Exhibit B
JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on Schedule 13G, and any
further amendments thereto executed by each and any of us shall be filed on
behalf of each of us pursuant to and in accordance with the provisions of Rule
13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.
This Agreement may be executed in separate counterparts, each of which
shall be deemed an original, but all of which shall constitute one and the same
instrument.
Dated: September 9, 2008
POTOMAC CAPITAL MANAGEMENT LLC
By: /s/ Xxxx X. Xxxxx
Xxxx X. Xxxxx, Managing Member
POTOMAC CAPITAL MANAGEMENT INC.
By: /s/ Xxxx X. Xxxxx
Xxxx X. Xxxxx, President
XXXX X. XXXXX
By: /s/ Xxxx X. Xxxxx
Xxxx X. Xxxxx