Exhibit B
JOINT FILING AGREEMENT
This Agreement is filed as an exhibit to Schedule 13G being
filed by Potomac Capital Management LLC, Potomac Capital Management
Inc., and Xxxx X. Xxxxx in compliance with Rule 13d-1(k) of the
Securities and Exchange Commission, which requires an agreement in
writing indicating that the Schedule 13G to which this Agreement is
attached is filed on behalf of the below-named entities, that they are
each responsible for the timely filing of the Schedule 13G and any
amendments thereto and for the completeness and accuracy of the
information concerning such persons contained therein.
Dated: April 19, 2007
POTOMAC CAPITAL MANAGEMENT LLC
By: /s/ Xxxx X. Xxxxx
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Xxxx X. Xxxxx, Managing Member
POTOMAC CAPITAL MANAGEMENT INC.
By: /s/ Xxxx X. Xxxxx
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Xxxx X. Xxxxx, President
XXXX X. XXXXX
By: /s/ Xxxx X. Xxxxx
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Xxxx X. Xxxxx
