Problems with Postgres

I deployed the latest version of XWiki on Windows with Tomcat 6.0 and Postgres 8.1 and Linux with Tomcat 5.x and Postres 8.2. On both I have trouble logging in. When I log in as Admin and attempt to go to the admin page the systems asks me to log in again and I am no longer admin. Same for other users. Do you know what I should look at? -- View this message in context: http://www.nabble.com/Problems-with-Postgres-tf3672827.html#a10262956 Sent from the XWiki- Users mailing list archive at Nabble.com.