TOPIC: DT Register and JoomFish

Is there any easy answer about what on earth can be wrong when JoomFish just will not translate anything in DT Register? Everything should be set up right, I have a site which has been using Joomfish in three languages for ages and all other content/components are translated OK. It is just DT Register which does not work. I have the content element files installed OK, I can do the translations for different parts of DT Register in the Joomfish section on the backend. Translations are simply just not used for DT Reg on the front end. Everything works fine when I install a fresh version of Joomla, Joomfish, DT Register and the content element, but on my live site, no... . Been using SO much time on this one now. Please anybody, I know this could be more of a JF issue than a DT issue but I just cannot get it. Please anyone!?

DT Reg 2.6.2, Joomla 1.5.15, JF 2.0.4

Cheers Ben