not sure if it's just me but i'm having a hard time getting many of the modules to work in XOOPS 2.0.15
some of them are basic modules like the forum or wf-downloads

when i load them on 2.0.13 they work fine.

Please use the search facility on this site. This question has been asked and answered dozens of times during the last month.

This has fixed problems for many users:

Well the good news is that there is a fix for this.

Now - please note: this hasn't been fully tested as of yet, but it should sort out the problem.

I would recommend you fully backup database & site of course before usage....

Anyway - download this file - and replace the current version of /class/xoopsform/form.php with this. You will need to right click 'save as' and select all files as the file choice in order to save it as a .php file ready to upload.