JOINT FILING AGREEMENT

                                                                    EXHIBIT 99.1


                             JOINT FILING AGREEMENT


         In accordance  with Rule 13d-1(k) under the Securities  Exchange Act of
 1934, as amended,  the undersigned  agree to the joint filing on behalf of each
 of them of this Statement on Schedule 13G  (including  any amendments  thereto)
 and further agree that this Joint Filing Agreement be included as an Exhibit to
 such joint filings.  In evidence  thereof,  the undersigned  have executed this
 Joint Filing Agreement this 28th day of January, 2008.




                                     QUAKER CAPITAL MANAGEMENT CORPORATION

                                     /s/ Xxxx X. Xxxxxxxxxx
                                     ------------------------------------------
                                     Name: Xxxx X. Xxxxxxxxxx, President


                                     QUAKER CAPITAL PARTNERS I, L.P.

                                     By:  Quaker Premier, L.P., its general
                                          partner

                                          By:  Quaker Capital Management
                                               Corporation, its general partner


                                          By:   /s/ Xxxx X. Xxxxxxxxxx
                                                --------------------------------
                                                Xxxx X. Xxxxxxxxxx
                                                President

                                     QUAKER PREMIER, L.P.

                                     By:  Quaker Capital Management
                                          Corporation, its general partner


                                          By:  /s/ Xxxx X. Xxxxxxxxxx
                                               ---------------------------------
                                               Xxxx X. Xxxxxxxxxx
                                               President





                                     QUAKER CAPITAL PARTNERS II, L.P.

                                     By:  Quaker Premier II, L.P., its general
                                          partner

                                          By:  Quaker Capital Management
                                               Corporation, its general partner


                                          By:  /s/ Xxxx X. Xxxxxxxxxx
                                               ---------------------------------
                                               Xxxx X. Xxxxxxxxxx
                                               President

                                     QUAKER PREMIER II, L.P.

                                     By:  Quaker Capital Management
                                          Corporation, its general partner


                                          By:  /s/ Xxxx X. Xxxxxxxxxx
                                               ---------------------------------
                                               Xxxx X. Xxxxxxxxxx
                                               President


                                     /s/ Xxxx X. Xxxxxxxxxx
                                     -------------------------------------------
                                     Xxxx X. Xxxxxxxxxx




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