iTunes Activation Error from Audible.com

I have an audible.com account, and have recently moved my iTunes onto a new macbook (previously was using it on a pc). I have many audibooks from audible.com in my iTunes library. When I moved to the new computer, I was asked to verify my audible.com account into in order to authorise the new computer to play my audibooks. Keep in mind I had deauthorized by previous computer. Okay, so I keep getting an error message that says: "iTunes Activation Error. Could not enable this audible account because an error occured (-44134)."

I looked on the audible.com website for support, and learned that this error message occurs for 1 of 3 reasons, none of which apply in my case (they are:iTunes is damaged - but I have reinstalled iTunes twice so I don't think this is the problem; 2) using a vpn (virtual private network) which I'm not - I'm using ADSL connection in my home; or 3) audible server is down (which it's not).

I called Audible - the customer help guy changed my password and deathorized all prior computers, but the problem persists. He referred it to someone else who might know, but they never got back to me. I've sent countless emails - no responses. I am going to call their customer service again, but the problem is that I'm currently overseas and I don't want to spend hours on an international call. I am hoping that someone here has encountered this problem and can offer some help!

Thanks.