Trying to get CreateUserWizard textbox value

Im trying to get the values of a couple of textboxes in my createuserwizard
i treid - Dim strFirstName = CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("uxFirstName").ToString() - but this doesnt work

<asp:CreateUserWizard ID="CreateUserWizard1" ContinueDestinationPageUrl="/home.aspx" CssClass="createUser" TitleTextStyle-CssClass="createUser_title" InstructionTextStyle-CssClass="createUser_instructions" CreateUserButtonText="Signup" CreateUserButtonStyle-CssClass="createUser_button" LabelStyle-CssClass="signuplabel" TextBoxStyle-CssClass="signuptextbox" ContinueButtonStyle-CssClass="createUser_button" OnCreatedUser="CreateUserWizard1_CreatedUser" OnCreatingUser="CreateUserWizard1_CreatingUser" runat="server"> <WizardSteps> <asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server"> <ContentTemplate> <table id="signup ...