Hashed or Encrypted passwords are not supported with auto-generated keys

Question

I have create a Membership provider and changed my web.config to

Answer 1

This is because you are hashing passwords but haven't set specific keys in your web.config. There's a "key generator" snippet in this MSDN article, run it twice and shove them in your web.config as:

And that should sort you out. It's like this because otherwise you could take your membership database/app to another machine and none of your passwords would work, as the auto generated machine keys would be different :-)