Everytime I insert a new cite, Endnote clash form the library window...

Everytime I insert a new cite, Endnote clash form the library window… and tell me: “fix or change the document in word”… but word file is O.K.

Its a document with plus 300 cites… and with most cites its more slow… what can I do? The word is OK… I´m working with Endnote X5…

Thanks…

Thanks for the response and the solution… now works perfect ! The problem was with a wrong cite, tha I hadn´t updated from the web.

Thanks a lot !