CCMS agent not getting registered

Hello,

No activities carried out on Solman 7.1 & managed system CRM 7

As I was getting error in RZ21 of solman for agent of our CRM7 system while testing connection,I was trying to re-register sapccm4x agent on managed system CRM 7

So first I stopped the current sapccm4x agent on CRM7 & de-registered it & re-registered which solved one problem of "hostname unknown"

But instead started giving new error shown below :

ERROR: can't register at SOLMAN. RfcRc = 2, AUTHORITY_NOT_AVAILABLE

RFC Error Info for SALF_CSM_AGENT_REGISTER

message: EXCEPTION AUTHORITY_NOT_AVAILABLE RAISED

status:  EXCEPTION AUTHORITY_NOT_AVAILABLE RAISED

CSMREG user in SOLMAN 000 has this role SAP_BC_CSMREG assigned & it works fine for all other managed systems.

Kindly request your help  to solve this problem & sapccm4x agent registered.

Thanks

Shradha