PDF troubles

I have three editors:

1. Events (title, description, date, drop list of menus from PDF Menus below)

2 PDF catgories (one title field- example: premier, special)

3. PDF Menus:

list field populated from PDF categories (field type: "list", name "category")

upload filed (field type: "upload" field name: "the_pdf_file")
extention allowed: .pdf
max up: 1
max size: 485kb
info1: title

I want to list menus (links) in a specific section of the site. Also, on an events page, an administrator will link a certain event to a menu. (cooking class, Italian Wine dinner).

Here is the current problem:

The pdf files appear to upload correcty. When I go into the Events editor to add an event, at the top is this error:

Warning: Cannot modify header information - headers already sent by (output started at xxxx/cmsAdmin/lib/menus/header.php:12) in xxxx/cmsAdmin/lib/database_functions.php on line 520 There was an error creating the list field. MySQL Error: Unknown column 'the_pdf_file' in 'field list'



thanks for any help.