433mhz - from server to node not working

hi…i’m using rak-2245 gateway for 433mhz… i am using rak gateway os in pi 3b+…

from node to chirpstack server the data is receiving… but i am working on reverse communication…
ie. from server to node , data is receiving in gateway but its not going to node (sx1276).

in indian freq 865 its working completely fine…

what am i missing …

changes in freq from server.toml and app-server sides are done…