Hi.

Im new to umbraco and im trying to make new members in umbraco thorugh a WCF service.

In umbraco i have made a Membertype called "Patient" with custom properties.

When im trying the following line in my c# code for the WCF service: 

MembershipUser newUser = Membership.CreateUser("username", "password", "email", "question", "answer", true, out status); 

I get an exception with "Object reference not set to an instance of an object. 

Stacktrace of exception:
at umbraco.cms.businesslogic.member.Member.GetMemberFromLoginName(String loginName)\r\n  
at umbraco.providers.members.UmbracoMembershipProvider.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, Object providerUserKey, MembershipCreateStatus& status)\r\n  
at System.Web.Security.Membership.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, Object providerUserKey, MembershipCreateStatus& status)\r\n  
at System.Web.Security.Membership.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, MembershipCreateStatus& status)\r\n  
at PatientNetService.PatientNetService.AddUserToUmbraco(Patient patientObj)" string

(The strange thing here is if i make an member in Umbraco, i can from my code get that member and override properties. I can also use CreateUser on that specific username and im then told that the username is already there.
Furthermore, i dont understand why it is calling GetMemberFromLoginName instead of createUser!)

I read multiple post regarding this issue and i tried even to use the deprecated Member.MakeNew, but this result in same error. 

Also read the the webconfig needs to be modified and it looks like this : (the important thing here is defaultMemberTypeAlias, as i understand it).

    <membership defaultProvider="UmbracoMembershipProvider" userIsOnlineTimeWindow="15">

      <providers>

        <clear/>

        <add name="UmbracoMembershipProvider" 

             type="umbraco.providers.members.UmbracoMembershipProvider" 

             enablePasswordRetrieval="false" 

             enablePasswordReset="false" 

             requiresQuestionAndAnswer="false" 

             defaultMemberTypeAlias="Patient" 

             passwordFormat="Hashed"/>

        <add name="UsersMembershipProvider"

             type="umbraco.providers.UsersMembershipProvider"

             enablePasswordRetrieval="false" 

             enablePasswordReset="false"

             requiresQuestionAndAnswer="false" 

             passwordFormat="Hashed"/>

      </providers>
    </membership>

Im surprised why this is so hard to do, and im running out of ideas now so im trying to get some help here :)

Hope you can help!