Hi, I'm Sudipto. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP
Do you use a Windows PC ?
Can you tell me, which version of Mac is installed in your PC ?
Windows or Mac OS is installed, because you just said that you are using a Mac Pro.
See, there are two different type of computers, one is MAC and another is Windows PC, if you can tell me correctly, which one do you use then, I can directly connect with your computer and help you to solve the problem.
Sorry payment failure, you have to call your CC company to release the payment.
Reply me after releasing your payment.
I will be able to solve your problem. But, you as seems to be nervous, I don't think you will be able to follow my steps to start remote session. I can help you through chatting also.
We can continue tomorrow.