[Plugin: cformsII – contact form] Form tracking hangs at "Processing, please wait"

First off, I must say I’m very impressed by the usability and flexibility of the cforms plugin. I’m using to created a subscription form for a client for a congress. Subscriptions get saved to a database and the client then uses the tracking feature to export the data in CSV or TAB format to Excel.

When I installed the plugin on a WordPress installation on my local development server (WAMP on Windows), everything worked like a charm. However, now that I’ve migrated the site to the live server (Apache on Linux) I’ve run into the following problem:

When I go to the tracking feature in the Admin pages the submission data doesn’t load. Instead, the message “Processing, please wait” never disappears.

I have checked in phpmyadmin that the form submissions are properly saved in the database.

Perhaps related to this problem is the following (non-essential) problem: On my development server, submitting a form using Ajax worked. On the live server, submitting forms only works with the Ajax option turned off.

One other thing I checked was the “download records” button in the form tracking section. Clicking that initially showed an error message saying I should change the permissions for the file plugins/cforms/js/include/data.tmp. I changed the permissions but the “download records” button still doesn’t work. Clicking on it now shows a blank page. Perhaps there are other file permission issues which cause the above problems?

I’d be really grateful if someone could help me out here, I’m really have no clue how to solve this.