Word 2007 Very Slow When Open A Document With Endnote.

Word 2007 become deadly slow when opening an document
modified by
Endnote X.1.0.1; Even if I reinstalled
Windows/Office/Endnote without
any Antivirus software running.

Does Word 2007 process Field code(using by Endnote to find
out
citations) differently from Word 2003?

The most weird thing is that Endnote X1.0.1 is claimed to be
compatible
with Word 2007, How can I do?

Thank you

p.s. "winword.exe -a" doesn't helps...