Create user

[shapper]

Hello,

I have created a class that inherits MembershipUser:
public class UserHelper : MembershipUser {
....

Then I am creating a user as follows:
UserHelper user = (UserHelper)Mem bership.CreateU ser("me", "pass",
"me@domain.com" , null, null, true, null, out status);

Membership.Crea teUser returns a MembershipUser

But I get an error:
Unable to cast object of type 'System.Web.Sec urity.Membershi pUser' to
type 'MyApp.Security .Membership.Use rHelper'.

If I don't cast it, which means, using:
UserHelper user = Membership.Crea teUser("me", "pass", "me@domain.com" ,
null, null, true, null, out status);

It does not compile and I get the error:
Cannot implicitly convert type 'System.Web.Sec urity.Membershi pUser' to
'MyApp.Security .Membership.Use rHelper'. An explicit conversion exists
(are you missing a cast?)

What am I doing wrong?

Thanks,
Miguel