Form does nothing - no entry - no error - no notifications - no message

Hello, we have a number of forms. One creates a post and emails us. Others just email us. One of them is not working and I can not figure out why.

This is the form: http://realestatepinoy.com/members/edit-property-listing/
When submitted, it spins for a while and then takes the user back to the form. There is no entry created. No verification message is shown to the user. The form should show the verification message once the form has been submitted. Put simply, it does nothing at all except take the user back to the form after they click on submit.

I turned debugging on, but did not see any messages relating to gravity forms when I submitted the form and it took be back to the form.

None of our other forms act in this way. However, this is the only form that has so many fields.

This only seems to happen when we are adding large images. Is there a timeout for image uploads? Is there a max upload size (server is set to 50MB)? If so what is it and can it be altered?

The odd thing was that there were no errors, no notification, no verification. It just said it was loading and then took me back to the same form.
I believe that the problem is one of two (or both) things.

1) Images my assistant was uploading were larger than 2MB each. While the server, account and even php.ini files are set to use 50MB for uploading files and 256MB for RAM, wordpress seems to have the file size limit set to 2MB. For some reason, this seems to cause this issue with gravity forms without any error. If I upload smaller images, it works fine. While this isnt a huge issue, it would be nice to know how we can ensure that an error is shown when someone goes above the allowed size limit. Users would not know what was happening if they are just taken back to the form they completed and they would assume that it has been submitted.

2) The script is timing out due to the images and/or the processing of the images on the server side. All images uploaded are stamped with our logo, so it will take longer to process than normal, but I wouldnt have expected it to effect the form in this manner.