howdy all you. had same prob. what i did , is follwing. i have vista ultimate firefox 3.6.3 . i installed java from http://www.java.com/en/download/faq/java_win64bit.xml to my 64bit internet exploder. after i did that, java worked in my firefox too. really strange. another place you might want to go is http://labs.adobe.com/technologies/flashplayer10/. there you find flashplayer for 64bit firefox. hope this info helps you boys and gals too...