FixtureNet Problem

Setup as follows:
Road Hog 4 (v2.3) connected through fixture net to Ethernet Port of an Arkaos Media Server running Media Master 4.1.3.
Arkaos Ethernet Running ArtNet set IP 10.1.1.1 subnet 255.0.0.0 and Road Hog 4 Fixture Net Setup IP 10.1.1.3 Subnet 255.0.0.0.
Problem:
When we switch on Road Hog 4 Arkaos doesnt detect any DMX or MSEX(CITP), we do a restart and then sometimes it detects and sometimes we try few restarts till it detects.
We check the Events Windows in Road Hog 4 to see what might be happening and it keeps saying CITP Stack Error Host Unreachable.
We tried to send Arkaos signal from another desk and works fine so not an Arkaos Problem ...
This setup was working fine few month back but I think then we installed V2.3 and never checked it and think this might be a bug. There was an earlier post regarding similar issue in which I do agree FixtureNet facing some issues.