Uh oh :(  There were explicit instructions at Daz3D about how to install Bryce6.1.   It had you doing  a few things that I never would have thought of and I would have messed up my install completely.  I wonder if this is what happened to you.  Check here and read how to install and see if you can find where it  went wrong:

http://forum.daz3d.com/viewtopic.php?t=54733

I followed it to the letter and had no problems.