Please forgive me if I am duplicating an inquiry, my eyes didn't find what I was needing...

My current site is running:MYSQL 4.1.10 with Server version 4.1.22-standard and PhpMyAdmin 2.9.0.2

This is my problem:
I went to the admin and played with the information on the additional customer fields. It doesn't show up when they log in so I am assuming that is not something this provides (when they apply for an account...) but when going to the customer information, click edit and looking to "Additional Customer Fields it is blank..." then when clicking on "update" I get this error...

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE customers_id = 1' at line 1
in:
[UPDATE zen_customers SET WHERE customers_id = 1]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

I am unable, all together, see the new fields either on the customer side as well as the Admin end of things.

ANY help you can provide (and I am sure you tire from the inquiries) would be absolutely relished and thank you in advance for your time.

VV