suddenly customers cannot change ship to

cart has been working fine, suddenly customer writes me and I went to site and have same problem. you add an item to the cart, and go to checkout. you click change address to change the ship or bill to, and it lists prior used address but does not allow entry for new. it was working fine earlier today, i don't know what is wrong or how to fix it! no admin changes were made.:frusty:

I went to the address book and it has a limit of 5 entries. I deleted one and then I could add a new ship to. Is there a way to set it to not add ship to address to the address book? this is really going to confuse my customers. if you have 5 addresses in the book, you cannot enter a new one.

In MySQL, run this. Replace '50' with whatever you like.

UPDATE zen_configuration
SET configuration_value = '50'
WHERE configuration_key = 'MAX_ADDRESS_BOOK_ENTRIES'
LIMIT 1;

You could do it the silly way and go to your Zen Cart Admin and use the Configuration ... Maximum Values ... :cool:

Address Book Entries
Maximum address book entries a customer is allowed to have