Hyperlinks truncate on import from Reference Manager

Hope someone can help. I am trying to have live journal hyperlinks in the
bibliography that is exported from Reference Manager into Word 2000. I
believe (?) the export works correctly from RM; however, the 'active' part of
the link/text is not the whole address, ie:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&d...=Abstra

where the 'live' part of the link ends at "....Retrieve"

This is the same for all of the references, but that doesn't tell me
anything because the text is the same for all the links except for the ident
number. Is the "&" the problem, or is there some length limiter for
hyperlinks or ?????

TIA!