I thought there was a different ddstool for nwn2 than the one for nwn1. I may be wrong about that, but I do seem to remember having to find the extra hoop to jump through to do conversions between the two different games.
I never bothered checking into NWN2 cc all that much once I learned enough about how the toolset worked to build an area, I just stopped being interested in nwn2 at all.
Multiple folks convert from nwn2 to nwn1 though, so there has to be something that works somewhere.