Can't upload from drop box

Each time I try to upload a document from Drop box it either just keeps thinking or says there is a problem uploading.
I have managed to do this before and I have not changed any settings (that i am aware of)

Hi salbluez,
Give this a try:
- From iDoceo's main screen / Options / Dropbox / unlink.
Now restart your device by pressing both the home and top buttons simultaneously for a few seconds.
- Open iDoceo again / Options / Dropbox / Link.

Hope this helps