Not going to PayPal when buyer clicks on Buy Now

[assemblytube]

I have upgraded SMF Classifieds with the latest version 4.0.6 and set up some dummy items.
When a member who has permission to buy, clicks on Buy Now, they get this message
"Please contact the seller for more information on paying for the item purchased" instead of being taken to PayPal. They never get taken to PayPal.

I sell many items using PayPal on my WordPress websites so I am assuming my PayPal account works. I also have Paid Memberships on this SMF site and these are working with PayPal

Have I missed out on a setting somewhere?
My site is http://assemblytube.com/forum/index.php and I am running SMF 2.0.12

Any thoughts on where should I start to look for a solution?
Thank you.

[assemblytube]

Going to answer my own question. I did not have my PayPal address in the listing. Doh!!!
Working now. Sorry to be so daft.

[SMFHacks]

No problem I thought that was the case.