Setting two flat rates for each geozone, based on price?

Basically, I want to set up four flat rates:

Order less than £30 in geozoneA
Order more than £30 in geozoneA

Order less than £30 in geozoneB (everywhere but geozoneA)
Order more than £30 in geozoneB

I've tried using two different modules (Total Based Shipping and Multi Flat Rate Shipping), and neither seems to be working. The flat rate just shows up as 0.00, if at all.

I've basically tried setting up, say, geozoneA, and using "5.00:30.00,15:00:1000.00," so that orders of £30 or less are charged £5 shipping, and orders of any more (up to £1,000) are charged £15.

Does that make sense? Any idea why it's not working?

Thanks, all!

If you purchased my Total-Based Shipping or Multi Flat Rate Shipping extensions, please contact me with your order # and I can assist you. You can e-mail me at the address in the extension files, or contact me at www.getclearthinking.com/contact.

If you're using Total-Based Shipping, then a rate like this should work for what you describe:

0-30 = 5.00, 30-9999 = 15.00

Thanks, Johnathan. I'll take your advice and contact you if there's still a problem.

Just for everyone's reference, I solved this one by installing Johnathan's (Clear Thinking's) Formula Based Shipping extension.