Trouble with Excel Macro called from ASP

Hello, first sorry about my english.

I´ve the next situation in an Excel Macro. It works fine executed from the Excel file on the server. It creates a PDF file.
It´s necessary to add the "Acrobat Distiller" reference to the Excel VBA Proyect.

Sub PDFReports()

Dim PSFileName As String
Dim PDFFileName As String
Dim myPDF As PdfDistiller
Set myPDF = New PdfDistiller
PSFileName1 = "Competitor.ps"
PDFFileName1 = "Competitor.pdf"

Application.DisplayAlerts = False

'Print the Excel range to the postscript file
Range("Competitor").PrintOut copies:=1, preview:=False, ActivePrinter:="Adobe PDF", printtofile:=True, collate:=True, prtofilename:=PSFileName1

'Convert the postscript file to .pdf
myPDF.FileToPDF PSFileName1, PDFFileName1, ""

End Sub



The problem is that when I try to executed it via ASP it doesn´t work (the Excel instance does not desapear from the TaskManager).
It´s not a problem from ASP calling because others macro´s call work fine, so there should be a trouble in the VBA code.

Does anyone know why it does not work?

Thank you very much.