How to update the reference in Endnote from DOC file.

I was obessed with such a problem:

I have created a libirary in Endnote, but there are several references were inputed manually.  the name fomat of reference inputted  are wrong, so, if in word, update reference, the bad will emerge.

I changed it in Word, but the orginal in Endnote will not change correspondingly. and if I quit Word, and open the file again, the bad format will emerge again.

I want to know, If I change a reference in Word, how to give a information to Endnote, and make a change synchronously.