A problem in Zotero capturing information

Hello Everybody,
I have a problem in Zotero when capturing of citation information from my whole webpage.
I recently provide latest version of Firefox for Zotero that will run smoothly and update my ZoneAlarm after doing an improvement in my Windows Vista system an error occur in communicating Zotero.
In my other PC, Zotero is doing well in my XP.
Could someone help me regarding the trouble encounter?
Thanks in advance.

Zotero – Error
An error occurred communicating with Zotero. Please ensure Firefox is open and try again.
