Hi,
That appears to be a bug introduced by some re-factoring in the ms sql data layer. I've corrected it and uploaded new release files 2-2-3-8-1
Just backup mojoPortal.Data.dll, mojoPortal.Business.dll, and mojoPortal.Web.dll and replace with the new ones. Actually the changes in the web and business dll are just to fix a different bug in the blog, only the data dll is needed to fix this bug.
Thanks,
Joe