I can not activate my customer portal

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Good morning,

I have bought a Remote access license with email address. This email adress has a previous license of remote access, and when I want to assign new license to this email I received a message that email is used with another license.

Then I use another email address and all is working fine. I assign this new license, I create remote computers and I can access to Management console.

But when I want to access to Customer portal, I have to enter my invoice number and I received this message "Customer type is not CUSTOMER."

Please, can anyone help me?

TIA

Eduardo