RedHat9:How to find what is blocking the port 1526/tcp

I'm trying to configure IDS9.40 on Ret Hat 9.

The server has opened the port 1526/tcp

nmap (nmap -sT -O linux) reports correctly that the port is open.

However, portqry (portqry.exe -n 192.168.0.101 -e 1526 -p TCP) reports that the port is closed for connection:

TCP port 1526 (turbo service): NOT LISTENING

I've dissabled the firewall on linux (/usr/sbin/setup) also added the IP address of Windows client into /etc/hosts.allow

Does anybody have any idea what I've missed out?