Exec-PHP stopped working – can't find why

I use Exec-PHP on two sites on the same server and for some reason it has stopped working on one of them.

The working one shows a list of resources with a colapsing option at http://www.magiclovebus.org/resources and the same set of resources, using the same set of code is not working on the page at http://www.thelovevolutionsolution.org/resources.

I have a test version of the setup on my local machine and it works fine there. I also have the same plug-ins installed so cannot figure out why it no longer works on one of the sites.

Any help and suggestions, would be most welcome.

Thanks
Hans