The cookie used to identify your login session is unable to handle a login from two different browsers at the same time. So, it's the expected behaviour that you get logged out on the first browser as soon you log in to the same account from a different browser.
thanks guys. its working fine now. I solved it by enabling database cleanup and selected a every week and I also enabled htmlawed
In first, go to http://community.elgg.org/groups/profile/75603/professional-services and open discussion in there.
Also, see on some works:
http://weborganizm.com/wall/v/163/personal-social-network
We get most of our custom work and theme customization at http://juipo.com/ (they do have great themes and really outstanding support)
Also there are great themes at http://www.perjensen-online.dk/
I'm sure there are more but I can personally recommend these two.
Good luck.
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