How can I add a new 'Payables Business Unit' when I do the setup for a Credit Card Program?

Summary:

Creating a new 'Payables Business Unit' for Setup Credit Card Program

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Dear all,

How can I add a new 'Payables Business Unit' when I do the setup for a Credit Card Program? 

We have already create a few Business Units which are in use for Expense Module but not all of them are visible, when I search in field 'Payables Business Unit'. (see screenshot) 

Path for setup a new Corporate Card Program: Setup & Maintanance -> Expenses -> Manage Corporate Card Programs -> Create a new Corporate Card Program

Do I have to active someting that the Business Units which are already exists will be also visible and selectable in the Field 'Payables Business Unit'?