You have that wrong on the extensions, notice how I have image/gif, image/jpeg etc. That basically is telling it the extension is that of an image with the extension of .gif or .jpeg. What you need to do is change those you have at the end to this:
Code:
application/txt, application/zip, application/gz, application/tar
You don't need to have gif and jpg as I have already included that with this addon.
Add the link above in the code box in place of your
Code:
txt, gif, jpg, zip, tar
Then it should work.