How do I create a Catalog for use in the order desk when adding orders manually

Hi all,
I am not using the Web forms so am just looking for an offline solution.

What I would like is to be able to add orders manually and choose products from a Catalog.

So at the moment this is what I am doing:
- Go to order desk
- Right click and select 'Add order'
- Click the 'Add button'
- Click 'Get Item info from Catalog'

I get an error message saying 'In order to select items from a catalog in the Add/Modify Catalogs dialog box'. See attached screenshot.

Where can I do this? I've spent hours trying to create this catalog. I just have a list of 20 products I'd like to add to it and don't want to type out the name and price of every product each time. I can see that there is a catalog like this in the Escona tutorial so it must be possible..

I'm using Maximizer 11.

Would really appreciate any assistance..