Did you have an account already in d2ol that you could log in to? And then did another install for a new node? And then you can't log in to the d2ol site and "add" your new node? Is that the problem??? If so, then you are off a digit or two in your email address for the new node, otherwise it would show up when you go to the "add node" function at the d2ol site. Nodes can be added whether they have points accumulated or no points yet.
I wouldn't add any more points to that node if you can't get it registered by varying the email addy. I'd go through registering a new node again and then make sure you can add it before socking many points into it.