Buddypress Admin Bar problem

Hope someone can enlighten me on what to do here, I have posted this on buddypress forum but no answer yet.

I have a problem with the Admin bar. I have installed wordpress on a sub-domain. My installation address is different from my website address on wordpress. Let say my installation address is ”http://www.main.co.uk/bp” and my website address is ”http://www.bp.main.co.uk”. When logged on as a registered user to the main page on this url ”http://www.bp.main.co.uk”, the links on the admin bar on top of the page I see is ”bp, Login, Sign up, Visit”. As a signed in user, I should be seeing the admin bar with the links ”bp, My Account, Notification, Visit”. Which means something is missing somewhere.

Can anyone please help…?

Thank you..