Type is Invalid?

This was working fine before. Now it gives an error: "Type is Invalid!" I've marked the line of code it occurs.

VB Code:

Sub ADOCreateTable()
 
   Dim cat As New ADOX.Catalog
   Dim tbl As New ADOX.table
 
   ' Open the catalog
   cat.ActiveConnection = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
      "Data Source= c:\windows\system\kamo.mdb;"
 
   ' Create a new Table object.
   With tbl
      .Name = categories.txtcategory.Text
      ' Create fields and append them to the new Table
      ' object. This must be done before appending the
      ' Table object to the Tables collection of the
      ' Catalog.
      .Columns.Append "FilePath", adVarWChar
      .Columns.Append "FileName", adVarWChar
      .Columns.Append "Filesize", adVarWChar
      .Columns.Append "Artist", adVarChar
      .Columns.Append "Title", adVarChar
   End With
 
   ' Add the new table to the database.
   cat.Tables.Append tbl  'ERROR OCCURS HERE
 
   Set cat = Nothing
   
   
 
End Sub

Kind of a wierd problem, but I pasted this code in and got the same failure, I changed the two adVarChar to adVarWChar and it works fine. Give it a shot, they both should create a text field 255 characters in length.