please, please help - can't access HTTPFileCollection

hi.

i am having probs accessing the HttpFileCollection.
the count/length is always zero. the file upload parameters passed to
the page
that should be getting the httpfilecollection looks like this.

uploadprogress.aspx?&video_2=C%3A%5CDocuments%20and%20Settings%
5CAdministrator.FTP-SERVER%5CMy%20Documents%5CMy%20Music%5C
iTunes%5CiTunes%20Music%5CJarabe%20De%20Palo%5CLa%20Flaca%5C
01%20Quiero%20Ser%20Poeta.m4a&video_1=C%3A%5CDocuments%20and
%20Settings%5CAdministrator.FTP-SERVER%5CMy%20Documents%5CMy
%20Music%5CiTunes%5CiTunes%20Music%5CJarabe%20De%20Palo%5CL
a%20Flaca%5C04%20La%20Flaca.m4a&video_0=C%3A%5CDocuments%20
and%20Settings%5CAdministrator.FTP-SERVER%5CMy%20Documents%5C
My%20Music%5CiTunes%5CiTunes%20Music%5CJarabe%20De%20Palo%5
CLa%20Flaca%5C11%20La%20Flaca%28Acustica%29.m4a

but, when i iterate though the httpfilecollection, i always get a
length = 0 and, hence, myfiles.Count = 0.

this is an upload using javascript (not the asp:fileupload tool)
from the referring page and through a hidden iframe - could that be
messing things up?

below is the server code that (is supposed to) iterate through the
httpfilecollection.

help "much" appreciated at this point.
thanks.

'get the form file collection
Dim myfiles As System.Web.HttpFileCollection =
System.Web.HttpContext.Current.Request.Files
Dim iFile As Integer

For iFile = 0 To myfiles.Count - 1

'get the posted file
Dim postedFile As System.Web.HttpPostedFile =
myfiles(iFile)

'make sure it is not blank
If Not postedFile.FileName.Equals("") Then

'Upload a file the FTP server.

ftpClient.UploadFile(System.IO.Path.GetFileName(postedFile.FileName))

End If

Next iFile