How (and where) to upload manifest file? (Google Gmail Gadget)

I'm new on this Gmail Gadget developments and I follow the instructions here: https://developers.google.com/gmail/contextual_gadgets

I follow the Hello World example, replacing the variables with my owns, generating the manifest, the specs, etc.

But when it comes to upload the manifest file, it's saying to go to http://code.google.com/googleapps/console/a/yourDomainName and log in there. Then there is a serie of steps depending on this one.

The problem here is, what is the address I have to put there? I did register on the Google Apps (for bussiness) and register a domain. Still that domain isn't work.

I found several people with the same problem and none gave them a solution:

How to create an account on Google Apps to use Google Apps Extensions Console?

Logging into Google Apps Extension Console

http://grokbase.com/t/gg/google-appengine/141vmhsdqr/how-do-i-log-in-to-google-apps-extensions-console

Anyone knows how to create a Gmail Contextual Gadget?

Thanks in advance!

I suggest : https://code.google.com/apis/console/

Go on that link a for log in use your Google Apps for bussiness account , then create new project (gadget) and then you can upload manifet. Sorry for my English.

Hope this will help you.