Adding data to custom database

Hi,
I submitted a this problem a couple of days ago, and it got me a lot further (I can post individual rows to the database i’m using). However i just got back to testing, and have realised if I add more fields to my table (to make each an array) it no longer submits. (completely crossed my mind to test this last time round)

Link to previous posts (with all code) available here: http://wordpress.org/support/topic/adding-data-to-custom-database?replies=14#post-3230380