[2005] Specified cast is not valid.

[space_monkey]

Ok in my asp.net app, i'm using a dll to turn a document that has been uploaded to the server into a pdf document. Everything had been working fine up until today, when i got this error "Specified cast is not valid." on this line

_PDFCreator = New PDFCreator.clsPDFCreator

Code prior too that line

Imports System.IO
Imports System.Data
 
Public Class CREATE_PDF_SERVICE
    Private WithEvents _PDFCreator As PDFCreator.clsPDFCreator
    Private ReadyState As Boolean, pErr As PDFCreator.clsPDFCreatorError
    Private Const maxTime As Long = 20
 
    Public Function CREATE_PDF_FILE(ByVal FILE_NAME As String, ByVal OUTPUT_PATH As String, ByVal LINK_PATH As String) As String
 
        _PDFCreator = New PDFCreator.clsPDFCreator

If you could tell me what stupid thing that i'm doing or point me in the right direction i'd appreciate it.