Users are unavailable in dataform for hyperion planning
===

I m new in Hyperion, doing dataform access provisions.
I have created dataform and also users.
The user can see all the data-form in an application.
I have to authenticate the access of data-form for particular user.
I navigate to administrator then manage data-form then click on data-form and then press Assign Access button here I press Add access button but I could not see any user or any group that I have created.

Could you tell me why I am not able to see the any user in assign access . 