Domain Mapping user is not logged in on front end

HI Guys

I am running the domain mapping plugin and have Administration mapping = 'domain entered by the user' on the plugin. I can login to all sites on the network with no trouble. On the front end however I am always shown as logged out so no cookie is being set for the mapped domain to keep me logged in on the front end.

If I try any other settings for "Administration mapping' other then 'domain entered by the user' I am always faced with the login page for whichever dashboard I choose to visit so no cookie is being set at all?

Your help is appreciated

Kieran