How do you expect Nokia to investigate? Do you think they have direct access to Mobjab's servers and representative that's currently AWOL from this thread?
That reminds me of how I once called T-mobile some years ago to complain that their Wireless Village server is broken and expected their tech support to even know what that is.
Don't hold high hopes for the built-in IM protocol on Nokias. No one wants to provide this service (because you cannot profit from doing so). The best outcome is if an Open Source project picks it up and allows you to install the server on your own *NIX box. Then you wouldn't have to call Nokia or T-mobile to complain that your own server is broken (or wait for others to implement/fix a feature, like Mobjab, who are probably now wondering how to recover those programmer-hours spent for free on the project).
Another solution would be a Nokia BETA labs Nokia-hosted-server project, but, as evident from the newly released Nokia Chat, Nokia is more interested in its own GPS-powered IM service than donating efforts to AIM/Yahoo/MSN/Google. Especially Google, who is probably sitting on top of its Android pile and realizing the importance of access to hardware. Did I hit all irrelevant third-parties in this rant, or did I miss someone?