Unable to connect

I cannot connect my computer to Teamviewer. I was using Teamviewer trial version and then bought a license (for 3 computers). My computer has two numbers and is now running the 174... number, but the website has a 1020... number for this computer. I just deleted the 1020... number on the website and added the 174... number, still will not connect. Says the trial period has expired, so I say I am an existing customer. Then says I have too many computers (3). But I already have this computer in my list on the website. How can I connect?