profile error

I have two sites in which I use a profile system. In one of the sites, the profile appears to work well, but in the other I get the error "Object reference not set to an instance of an object." This is the code: protected void cuwReg_CreatedUser(object sender, EventArgs e) { CreateUserWizard cuw = (CreateUserWizard)FindControl("cuwReg"); //empty Profile for newly created user ProfileCommon p = ProfileCommon.Create(cuw.UserName, true) as ProfileCommon; p.Initialize(cuw.UserName.ToString(), true); txt = Util.FindChild(cuw, "UserName") as TextBox; p.UserName = txt.Text; //populate Profile from controls p.Phone = Util.FormatPhone((Util.FindChild(cuw, "txtPhone") as TextBox).Text.Trim()); p.Email = (Util.FindChild(cuw, "Email") as TextBox).Text.Trim(); p.FirstName = new System.Globalization.CultureInfo("en").TextInfo.ToTitleCase((Util.FindChild(cuw, " ...