session variable is not available from SLD to TLD

[ucitianz]

Hello,

I am working on a site which has two domain part e.g.

 

abc.com and xyz.abc.com ( sub-domain of abc.com )

 

when one get logged in at xyz.abc.com, It store username in the session so that if any user after logged in at sub-domain, manually enter abc.com in the address bar, he should be redirected to xyz.abc.com. But session is not working between these domain and sub-domain.

 

I have been looking around and come to know that session variables travel through TLD to SLD i.e. top level domain to sub-level domain and I need from SLD to TLD and I think this is the reason I am not getting value.

 

I have tried this with Cookies and Sessions but absolutely stumped.

Please advise.

 

Thanks a million!

Aamir.