[Zope] Problems with IE 4.0 and 5.0

Hi ! I experienced a few problems with file-uploads with the Internet Exlporer. I created a formular that does a file upload to zope using <form action="uploadFile" ENCTYPE="multipart/form-data"> <input type=file ...> in python i use the file.read() function. everything works fine with Netscape Communicator but when i do the same thing under IE i get a the following error: string type has no attribute read() Any suggestions?? regards, Alex