Google Feed - google product category

[Guest]

Hello, I just installed the update to "goolgefeeder.php" (http://addons.oscommerce.com/info/4513) (Google Base / Froogle Data Feeder v1.00)

and all went well. Everything works fine, except i still have this error on the "google merchant center"

 

 

Missing recommended attribute: google product category

 

is this not a required attribute?

And how can i add it to the feed?

 

Any ideas?

 

Thank you

 

-frank