bsod with msnmessenger & mozilla

I’ve a big pb : underwin98, when i use the webcam or the audio on msn messenger , i can’t use mozilla firefox after… i get a bsod !!!

I have no problem when i use IE6 after messenger…

I wonder if it could be due to the use of avast!, as i can’t find any topic about it in the firefox forum…

could you tell me what you think about it ?

Firefox is experiencing trouble with WebShield…
Can you test disabling it and posting the results?
Can you post more information about the error message in the BSOD?

in fact, i don’t think it’s apb with avast :-[ , i uninstalled it and same pb… I get a “fatal error 06”.