SMLG Groups do not work

Hi Experts,
SMLG Group created but can not connect from SAP GUI

Our message server = napw1rci.private.dm ( C I instance ) and 5 application servers are
napw1ra1a.mpv.dm (with virtual host=napw1ra1 and SAPINST_USE_HOSTNAME=napw1ra1) to napw1ra5a.mpv.dm (with virtual
host=napw1ra5 and SAPINST_USE_HOSTNAME=napw1ra5), after configuring SMLG, on SAP GUI message server is picking up app servers as
napw1ra1.private.dm to napw1ra5.private.dm (which are not configured with the DNS) and
also not confgiured in the dialog instance profiles, now we cannot log in with the SMLG group.

Direct logons via napw1ra1a.mpv.dm to napw1ra5a.mpv.dm are working

Please help

Al Mamun