Retrieve PIN screen

Not exactly sure where you are in the process -but it sounds like you are not entering the pin on the client

Using the remote control of the main Genie HD DVR, press the MENU button.

Select Settings&Help.

Select Settings.

Select Whole-Home.

Select Manage Client.

Select Add a client.

Take note of the PIN that appears on the TV screen.(think you are here)

Go to the room where the Genie Mini client is located and enter the PIN.

Using the Genie Mini remote control, enter the PIN.

Select Add a New Location.

Enter a custom name for the location of the Genie Mini.

Select Save Name.

On the confirmation screen, select OK.

To apply the Genie Mini settings

• • Select COPY to mirror the settings from an existing Genie HD DVR or Genie Mini setup in your home. Next, select the location where you wish to copy the settings from. Then, select Watch DIRECTV or Browse the Guide to complete the guide setup.

Select DONE on the Add a Client screen of the Genie HD DVR.

Make sure you're leaving the pin on the screen and not exiting before going to the mini 

I have this problem also. I get the pin and keep the screen up, but when I go to the mini to enter the number on the screen, there is not a place to enter it. My only option is to hit cancel, and if I do that, I have to go back and generate another pin.