Custom segment for HRMD_A07

hello Experts,

I need to send Inoftype 0290 details on HRMD_A idoc,  the structure for IT0290 does nto exist in HRMD_A07. Hence i have created a custom IDOC segment, Z1P0290 and attached this segment to IDOC Extension - ZHR_EXT.

So far I have :

1. We30 - create segment Z1P0290.
2. Assign Z1P0290 to extension ZHR_EXT
3. Change technical attribtes for iT 0290 in PM01 and assigned Z1P0290  as IDOC segment
4. Added custom code in FUNCTION EXIT_SAPLRHAL_003 to send data to Z1P0290.
5. Everything works fine, but when IDOC is created Z1P0290 structure is not picked up. Instead all data is displayed in one line in field "OBJPS" - see attached image.

What am I missing?

Vaishali