cross check your name , use your last name, firstname complete, if gives you same error, contact VO. normal means sometime E-case accept lastname only, firstname only, sometime you need to enter full name as per passport , lots of people e-case not display complete address, postal code, state name etc. so if you try all the way and its not visible still then try again after some days.
cio , correct , my zipcode is not displayed on e-case, even somany times not allowed login me using my name , so i use last name , sometime firstname only.
OMM