after upgrade php to vfr 5.5

[shneler2010]

after upgrade my PHP server to 5.5 ... at Godaddy my forum not work other site like word press script it is working well
is there any thing can I do at .htaccess in my root
my VBbulletin 4.2.3 and i can not back to previous php version
Thank You

[Dave]

Why does it not work? What do the error logs display?