Vincent - can you clarify what you meant when you said "I changed my password on my foundation server."? Did you change the Administrator user password within the Composer?
If you changed the Administrator password, you will have to manually enter the ip address of the server into a browser and enter the Administrator credentials in the pop up screen. The Developer Portal is designed to log you in directly. If the Administrator password has changed, this automated process will no longer work.
We can delete the server and allow you to provision a new one if you need.