Can’t get the shipping options to appear

Hi there,
I installed the plugin as, although shipping is worked out by weight (same rate for the first 30kg), we need to also limit the volume per parcel (0.072m3).
In the first shipping rule, I entered the cost 9.65, then in max cart weight 30000 and max cart volume 72000 (the website is set in grams & cms). All other options I left as nil. But no matter what I place in the cart (definitely less than these limits), I only get ‘no shipping options’
What am I doing wrong?
Many thanks in advance!

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