PR item reject from code

Helloooo!

I person implemented support WF for BUS2009, and enabled a functionality to APPROVE/REJECT from a Link (using SICF)

Approval goes creat with BAPI_REQUISTION_RELEASE, but determination is thing akin for reject. I tried using CL_REQ_ITEM_PROXY_MM entity and calling if_releasable_mm~reject  method, but thing happens.

In addition, users that o.k. person nary entree to ME52n, truthful usage BAPI CHANGE is not an enactment

Any ideas oregon if_releasable_mm~reject  example? 

Thanks!