They did the same thing over here Stan - it's a real bummer. It was going to cost us $600 to get my supplies shipped to Samoa last year. We ended up splitting them between 4 of us, and the airline were very helpful and obliging letting us take more weight than you are supposed to. Of course it was a hassle lugging 40k of fluid everywhere, but it's doable. How long are you going for?
Stan, contact someone at the FAA if you cannot get anywhere with the airline.....they are supposed to ship medical supplies for free. What I mean is there should be no extra baggage charge for your medical supply suitcase.