To take your questions in reverse order...
QUOTE(eddy556 @ Nov 15 2006, 06:20 AM)

I've read somewhere that form elements may not appear in a table (specifically between the <tr></tr> tags).
No, that's not true. This is not the problem.
QUOTE(eddy556 @ Nov 15 2006, 06:20 AM)

Hi, I'm using a php script to create a HTML table which is full of information from a MS access database. As the table is created the php script also adds a checkbox and a qty number along each row. I have attempted to create another script (in php) which will allow the user to check the boxes and add qty's and this will POST these to another page, however when the submit button is pressed nothing happens.
URL of the page generated by this script?
So one script generates the page including the form. Now you need another script to handle the result of form submission. (A script to "allow the user to check the boxes ..." makes no sense.) Perhaps if we could see any of this - like this second script, it might be easier to point out the problem.