Exhibit 99.2

                            EXHIBIT A TO SCHEDULE 13G
                             JOINT FILING AGREEMENT


Each of the undersigned persons hereby agrees and consents to this joint filing
of Schedule 13G on such person's behalf, pursuant to Section 13(d) and (g) of
the Securities and Exchange Act of 1934, as amended, and the rules promulgated
thereunder. Each of these persons is not responsible for the completeness or
accuracy of the information concerning the other persons making this filing,
unless such persons know or have reason to believe that such information is
inaccurate.

                                         Dated:  February 14, 2003

                                         RBC Global Investment Management Inc.
                                         BY: /s/ Donald L.F. Cant
                                            ------------------------------------
                                             President & C.E.O.

                                         RT Investment Management Holdings Inc.
                                         BY: /s/ M. George Lewis
                                            ------------------------------------
                                              Authorized Signatory


                                         The Royal Trust Company
                                         BY: /s/ Donald L.F. Cant
                                            ------------------------------------
                                              Authorized Signatory

                                         Royal Mutual Funds Inc.
                                         BY: /s/ Russell Parre
                                            ------------------------------------
                                              Sr. Manager Risk