asp.net 'Remember me' not working anymore with forms authentication

Question

I have two websites with self written membership providers that are hostet on the same server in the same Web in different web-applications and different application pools.

Answer 1

The issue may be that you have validation keys that are automatically generated every time you launch the worker process. The cookie is encrypted, but when you come back a new server-side key is used and thus your cookie cannot be decrypted.

Check out the machineKey section http://msdn.microsoft.com/en-us/library/ff649308.aspx

Here is something that will generate the machineKey section for you http://www.qualitydata.com/products/aspnet-membership/help/configuration/no-machinekey.aspx