IIS 7.5 and Forms a

[thehatip]

Server configuration is: Windows Server 2008 R2, Framework 4, IIS 7.5, SQL Express 2008 R2My web site works with a database. I use forms authentication for accessing to the web-site. For authentication I use my database on SQL Express.It all works fine on my workstation. But when I run web-site on the server I have a problem with authentication, - I always get a message "Your login attempt was not successful. Please try again."If I run the web-site without authentication - it works fine with the database.I lost my hope to solve it. Please help me...