firefox fails to launch

[bluethundr]

hi list

 I finally got KDE 4 running on my FreeBSD 8.1 box! It was a happy day
as it took several days to compile...

 However after installing the firefox port I get a dialog box claiming that

 "firefox is already running but not responding. To open a new window,
you must first close the existing Firefox process or restart your
system"

doing a ps -ef | grep firefox does not show any firefox processes
running. how can I get firefox to work under freebsd?

thanks

-- 
Here's my RSA Public key:
gpg --keyserver pgp.mit.edu --recv-keys B6D6EAC3