Aspell Fox does not work

I am currently using FireFox 1.5.0.1, and found that the spellchecker Aspell Fox does not work. What a blow that is since I was long for a spell checking in a web browser so that I won't make stupid spelling mistake when filling up a web form. Let me know if you found some working spellchecker plugin for FireFox, as I haven't seen one yet.