Exhibit 24 -AA updating



Schedule II - valuation and qualifying accounts



                                                                           Additions
                                                          Balance at       Charged to                      Balance at
                                                         Beginning of      Costs and                         End of
                     Description                            Period          Expenses       Deductions        Period

                                                                                              
For the year ended December 31, 1998,
   Allowance for doubtful accounts................               --          $17,160             --        $  17,160
For the year ended December 31, 1999,
   Allowance for doubtful accounts................       $   17,160          $95,840        $ 3,000        $ 110,000
For the year ended December 31, 2000,
   Allowance for doubtful accounts................       $  110,000         $541,607       $442,705        $ 208,832