JCE, Docman and Acymailng are not known to create any conflicts.
Could you try deactivating one by one the other extensions, so we can find the conflict?

I have disabled everything else but Jfusion. I didnt figure out yet how to do it (disabling) properly and without problems. It integrates forum software SMF and Joomla. Possible to login smf and Joomla same time.

Is it so that these error messages that I posted in earlier message are leading to conclusion that there is some conflict/s.

Kind regards
Timo

Thank you for feedback Timo.
That is possible since Jfusion's user plugin might not work properly with K2.

I have to ask, how come SMF and not Kunena?

Hello!

I picked between PhBB and SMF when there was no Kunena yet or it was not an real option (year 2000 and something) I have liked a lot of SMF`s look and useability. Only minus thing has been this integration between two softwares. Alltough Jfusion has done well with it.

Do you recommend migrating to Kunena?

Kind regards
Timo

I would consider it since you have one userbase and one CMS, thus less time updating and maintaing your site.

The only downside would be that Kunena does not have PMs by default.