Hi jh2,
Welcome to this Microsoft Project newsgroup
Have you Calculation turned on? - Tools/Options.../Calculation tab.
If so, use the split screen technique to see what's going on. See my series
on Microsoft Project in the TechTrax ezine, particularly #10 on multiple
resources and #11 on task types, at this site:
http://tinyurl.com/2xbhc or
this:
http://pubs.logicalexpressions.com/Pub0009/LPMFrame.asp?CMD=ArticleSearch&AUTH=23
(Perhaps you'd care to rate the article before leaving the site,

Thanks.)
FAQs, companion products and other useful Project information can be seen at
this web address: <
http://www.mvps.org/project/>
Hope this helps - please let us know how you get on
Mike Glen
MS Project MVP