I am happy to use the FormsCentral and I tried to upgrade the service to Plus for one year. But, when I do the checkout, I am getting the following error message:
Error in Your Order
We’re sorry, but a system error occurred.
To complete your purchase immediately, please call Adobe Phone Sales at (800) 585-0774 to place your order, or try Adobe.com again.
Any idea to help
I'm sorry for the problems you've had purchasing FormsCentral.
I see by your Adobe ID (the email address you used to post to this forum) that you are in Saudi Arabia.
Unfortunately, FormsCentral isn't available for purchase in Saudi Arabia. See here for more details: http://forums.adobe.com/docs/DOC-1375
I apologize for the inconvenience.