Visual Basic Script Task Not Working Correctly

I am new to visual Basic and am having trouble getting this to work propery
All I am trying to do is check to sse if an excel file with the extension .xls exists at this path here \\customer100\c$\LicenseProd\BrokerFeed\ and if a .xls file exists then return success else return failure  - I am doing this script task in Microsoft visual studio 2005


      Public Sub Main()


        Dim filecount As Integer

        filecount = System.IO.Directory.GetFiles("\\\\customer100\c$\LicenseProd\BrokerFeed\\", "*.xls").Length;
       


        Dts.TaskResult = Dts.Results.Success
      End Sub

End Class