Endnote deleting my references

Hi.  I have a large endnote library with ~ 200 references and have been writing a large document.  I had 185 references in the bibliography, added a few new references, and whenever endnote updates the citations and biblography, i lose a large chunk of my citations in the bibligraphy (for example after adding 1 new refrence in the middle of the document I now had 115 references instead of 186 as there should be).  If I hover over the citations that are missing in the bibliography, i still see a little pop-up with the correct author information, but they are no longer included in the bibligraphy, and are no longer correctly numbered.

I am using EndNote X4 and word 2003 on XP.

Ive tried unformatting the citations, using "cntl-6 to delete “bad” code and then paste into a new document, but this doesn’t help.  Even if i take my file with 185 ref and change the formatting of the citations/bibliography, i lose some references.

Please help!

thanks for your time!