Jan,
now i tried installing your 4images gallery on another website of mine, just to test, and there it worked okay. the only difference being that on the website i want to run it, it is running php version 4.2.3 and on the other website, where i just wanted to test if it would work, they are using php version 4.2.2
These are the only differences between the two servers on which my websites are placed, as they are hosted by the same hosting provider. and they told me the only difference was the php version...
do you know of this "problem: and so yes, do you have a solution?