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Have you tried Catads 1.53
from here on Sourceforge?
This was OK with Xoops 2.3 and 2.4, but has not yet been updated to work with Xoops 2.5 so it may not work anymore. If you switch on Xoops debug in prefs and post any debug notices here it would be useful to me as I do plan to update it soon.
I will also need to know your server spec, Xoops, PHP and MySQL version etc.
If you search, you should also find a module called 'Classifieds' which is also very good.
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