Create Account through C# resulting in Data Element is NULL

Content

I'm getting the dreaded data element is null error when attempting to create a new account in OSvC. This code worked on a previous version of OSvC, so I'm wondering if something has changed, but I can't seem to find out what. I'm checking the various required fields and they all SEEM good...can anyone see anything wrong below?

Code Snippet

             {WindowsFormsApplication1.RightnowService.Account}
    base: {WindowsFormsApplication1.RightnowService.Account}
    AccountHierarchy: null
    accountHierarchyField: null
    Attributes: {WindowsFormsApplication1.RightnowService.AccountOptions}
    attributesField: {WindowsFormsApplication1.RightnowService.AccountOptions}
    Country: null
    countryField: null
    CustomFields: null
    customFieldsField: null
    DisplayName: "US"
    displayNameField: "US"
    DisplayOrder: 0
    displayOrderField: 0
    displayOrderFieldSpecified: false
    DisplayOrderSpecified: false
    EmailNotification: null
    emailNotificationField: null