The thing is this.

We have added the document library to a test page and configured  it so that we can upload pdf documents. But we keep having a strange problem.

Every time I upload a document it will go the next page.  (The page where you  can edit the setting) But then it will not submit it when I press “Bewerken” (or the English version edit). Even if I add a description or a date it doesn’t submitted it.

The hardest part is it doesn’t gif an error. So I don’t know what I’m doing wrong.
There is also no error in the event viewer.

So the only thing I could do was “Annuleer” (or cancel in English) .  And what a surprise! the file was uploaded  but it did not save the settings I gave to it.

After a view hour i thought of a genius plan. Why not post the Document library on a blank page.
And it works. (DUH!!!!) So we deleted all the other modules and found that the Contact module was conflicting with the Document library.

It was a really easy answer but after a hour of searching you just get frustrated.
And because it didn't give me any error and all the other options had no problem. I was almost sure there was something in the setting.

Thanks!