It sounds like you're confusing OAuth 2.0 authorization servers with OpenID 2.0 Providers. They are totally different. When "logging in" to the authorization server sample, which appears to be the failure point in your original question, you need to enter a valid OpenID.
The URLs you were trying appear to be URLs to the OAuth 2.0 client sample, which isn't an OpenID.
Unless I'm mistaken (which isn't entirely unlikely) the AuthorizationServer sample pretty much acts as a gateway which validates OAuth requests by authorizing the user against an OpenID provider. Instead of putting the relying party's URL in, you might try putting in an OpenID provider URL. (even for testing, you should be fine using any of the public providers you may have an account with).
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