Also check your settings in these locations:
http://www.mumsmeeting.com/admincp/o...roup=forumhome
http://www.mumsmeeting.com/admincp/o...ogroup=address
http://www.mumsmeeting.com/admincp/o...ogroup=general
Check that your forum read is set to Inactivity/Cookie Based too as for some reason you are set not to deliver cookies which is why your session hash is being displayed on every url.