Help to display segments from PEOPLE_GROUP_FLEXFIE

[smarteng]

Hi,
I'm new to SSHR and i want to display some segments from PEOPLE_GROUP_FLEXFIELD in payslip selfservice via Personalization ; i followed these steps:
1- Enabled the profile options to allow admin level personalization
2- Open the Payslip -> Personalization -> Add New Item with the following properties:

- Level : Site
- Item Style : Flex
- ID : PEOPLE_GROUP_FLEXFIELD
- Additional Text : Additional Text
- Appl Short Name : PAY
- Name : PEOPLE_GROUP_FLEXFIELD
- Prompt : People Group Flexfield
- Type : Key
but it gives me an error at Runtime (Flex VO () of flex bean (PEOPLE_GROUP_FLEXFIELD) is null.)
the error is related to the view instance , but i don't know which value i've to assign to it.

Please advice regaring this issue.

Thanks...