Zoho Assist upgrade not going through

Whenever I try to pay the $12/month to upgrade my account, it just hangs up at "please wait". I've tried in two different browsers, but having entered in my credit card info, I would REALLY like to avoid trying to click submit over and over. Furthermore, when I logged in on another browser, it had me login again as if I were a new user.... Any ideas?

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Release Notes: Version 1.91, February 2015
Unattended Access (Beta) is live! Unattended Access, a feature requested by a lot of our customers is live now. Currently, it's in beta. You can add up to 100 computers per Technician subscription. They can also be accessed by your organization members. My Computers list in Zoho Assist home page will always display the online status of your unattended computers. You can rename the computers whenever you wish. Currently, Unattended Access can be configured only for Windows computers. Nevertheless,