Google checkout cart

Hello I'm kinda new with drupal and I'm trying to set up a cart with google checkout. I have a google account set up and I have the merchant id and key inserted into my site. When I click on the google checkout button it shows a url id or password error? I can't figure out what it might be? Also what is the path/setting to place google checkout button on all products- pages? The logo is present at the bottom of one catalog item (product kits) but not the others. I have 5 different catalog listings/merchandise.

Also I'm trying to set up a cart in my site and need the add to cart button placed next to the same place the google buttons should be? I would appriciate any help with this? Thanks