How can I sign up with Enterprise program, while I have an active membership of the iOS developer program?

How can I sign up with Enterprise program, while I have an active membership of the iOS developer program?

I have bought a memership for the iOS Developer program.

I have created an in-house app.

Now I want to publish it to all employees without registering the devices.

So..

I go to their website and try to sign up for the enterprise program, image shown below:

http://s29.postimg.org/q06ylh5o6/Clipboard01.jpg

Within the image above, I click continue... 🙂

http://s14.postimg.org/46lqcpy74/Clipboard02.jpg

Then I am taken to the image above, there I need to select a program, but I already have a program, the iOS developer program! And the checkbutton of that program, is disabled. If I try to click continue at this page, without sleecting a program, a javascript-box shows "You have to select a program before continuging"...

Do I need to unsubscribe my iOS developer program, to then register it again? Lol!

PS: no clue where I should post this, looked over the forums and could not see anything related to singing up, registering for a program...