Cookie problems

[DMG Online]

Im running a phpbb3 forum and for some reason I keep getting logged out. I was on Vox and that got switched to stoli, I changed my primary domain to www.str8heat.net

here are my board cookie settings

cookie domain: http://www.str8heat.net
cookie name: phpbb3_bpdqw
cookie path: /community
Cookie secure:
If your server is running via SSL set this to enabled else leave as disabled. Having this enabled and not running via SSL will result in server errors during redirects. DISABLEDso am I doing something wrong because this is frustrating, my cookies are fine everywhere else except on my own site
Edit:
bump *sorry if its unallowed*

[TechAsh]

You could try setting cookie domain to "str8heat.net" (Remove the http://www.). That's the way it's setup on my phpBB3 Forum, which works.