Error when trying to send image from android app - by: Bob Diaz

I have installed the following:
Joomla 2.5.20
PhocaGallery 3.2.6
JoomPhoto Mobile 2.4.1

I have connected successfully from the app to download the categories from PhocaGallery.
When I try to send a picture from my gallery (after selecting a category and size) the app says it is sending then this message appears:

"There was an error. Verify in your site the problem"

All the checks for the extension are OK.
The account I am using for the app is a member of Super Users.
I do not know where to check for the problem as my Joomla logs do not show anything about this error.

Can you please tell me how to trouble shoot this?
Thank you