Why is NetView using port 50161

[Bernard Disselborg <bdisselb@triple-p.nl>]

Hello,

I've installed NetView 6.0.2 on a NT 4.0 Sp6a machine.
The problem I have is, I can only get SNMP values of the NetView machine.
On any other node I get a timeout error message. They are supporting SNMP 
and I am using the correct community strings.

Sniffing on the network I found that NetView is sending SNMP requests using 
port 50161 in stead of 161.

Why is this ?
Can this be (re)configured somewhere ?

Thanks in advance,