You (appear) have everything set up right..
It's the weight of each item (or lack of it) that appears to be the issue.
If I add one chart, I get no rates, but if I add 10 charts I get rates.
What measurement are you using in the module ?
Check what weight you are using as a default, and check what weight you are entering for each item.
Also check the dimensions..
When I add 1 chart I get dimensions of 32.4x22.9x.01 so that's a width of 1mm ?? Obviously the width of the paper..! I'd make that 10mm...
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