MySQL ENUM type and Select Multiple in form

Hi all. I am playing with my 1st PHP MySQL database frontend. I have it
adding records from the PHP page, but I am having trouble with ENUM type
in the database, and Multiple Select listbox on the PHP form... IS there
something special I need to do?

If I select all 6 entries in the multiple select listbox, I just get 5
passed into the query. I am also having trouble (for the same reason I
suspect) with a ENUM "true","false" type and a "Yes" "No" pair a radio
buttons.

What is this newbie missing??? (apart from common sense..)

Thanks.