Paypal Integration problem


I'm hoping you can help.

I have managed to setup a link on my site where it allows you to pay via paypal.

after being redirected to paypal, where is says “order of summary”, it is blank even though i have added something to the cart…i've done a search on google and there are a few having this problem with oscommerce etc. any ideas as to what could be causing this?

Also, how can i get rid of the “checkout” button as all i want is the paypal button for now.

thank you.