NAS External access

I have a File server name Synology, it has option to share files to external users, i tired to share the files but remote users not able to access it,

i have two Firewall in my Domain, one UTM version 9.711-5 another XG.

On XG i just created DNAT and allowed the fileserver to http and https access, this work fine and remote users have no issues.

But from UTM i did the same, i done creating rule for file server and allowed port 5000 and Dnat rule, but it not work.

Any suggestion would be appreciated