Cannot copy/paste

I am the web developer but instead of using DreamWeaver to update content, I will update articles using InContext Editing.  I have been able to copy and paste in the past but suddenly I cannot.  My associate is still able to copy and paste into the same exact area where I am trying to copy and paste.  We are both using Firefox.

I have not changed any user rights.  I just get an error that says "cannot access the clipboard".  This is only a problem in Incontext editing.  I can copy and paste in other apps.

Thanks

Scott