Updated mysql 5.5 e on sever now my forum is going nuts.
 

Well i was running 3.8.5 and i updated the server software to mysql 5.5 php stayed at 5.3.18
now my issue is i can't get to the /forum where my site resided. its forwarding me to my 404 page i went into the /includes/cofig and enabled it to turn off all pluggins.

I went so far to dl 4.1.x
when i go to /install/
my site is sending me back to my 404 page.

Anyone got any helpfull advise?