[Plugin: Contact Form 7] Can't seem to upload anything else but pictures

The form works fine but i can’t seem to upload anything else but pictures i have tried videos and mp3 i added all the tags right because when i test it with a image i get the image in the email when i try setting one up for a mp3 i see a uploading in the browser but the page never changes and i never get a email. Is the upload feature just built for images and documents and nothing else

http://wordpress.org/extend/plugins/contact-form-7/