Urgent help with Sessions and Cookies

I have a very, very little site for a client, I have to set a username and password to admin some data they publish, the problem is that in my server the cookies and sessions work excellent, but when I publish the same code in my client's server it doesn't work, the cookie is deleted immediately, and sessions dissapear too, I have other sections in the same server using cookies and session and work fine, but in this specific directory it doesn't work. Any idea??? Jadiel Flores ------------------------- http://www.abargon.com jflores@abargon.com (52-55) 52-29-80-34