Check to see if there's a javascript problem (the editor/messager IV uses depends on it).
1) Are you running a pop-up blocker? That might be stopping javascript from running.
2) If pop-up blocker is not at fault, check in your Firefox (it should be enabled by default). The procedure is:
a) Under the Firefox "Settings" page, locate the setting search box and type “javascript.”
b) Next, locate the option labeled “javascript. enabled” in the search results.
c) If that value is "false" click Toggle to enable JavaScript. The Value column should change from “false” to “true”