XDMCP fatal error: Session declined No valid address

Hi ppl, anyone has encounter this error before? I can't remote login to another machine residing in the same subnet via CDE and the error I get in var/dt/Xerrors is

XDMCP fatal error: Session declined No valid address
Warning:
Name: submenu_options_button
Class: XmRowColumn
Illegal mnemonic character; Could not convert X KEYSYM to a keycode

I've been working on this problem for days but can't solve it. When I did a remote login, the screen simply blink a few times then back to the local CDE login page. I have done a snoop on the interface and the traffic did arrive at the remote machine, but the remote machine is not replying so I wonder what could be the problem? I tried to play around with the settings in /usr/dt/config/Xserver and Xconfig but doesn't help at all...:frowning:

I dont quite understand why you're doing this.
You can use xhost on your current CDE ...? tried that?
BigAdmin - Submitted Tech Tip: Using a Remote Display

well tried that also and the problem persists. It doesn't really bother me but I just wanna fix it. I'm trying to to fix every single problem I encounter. Running out of ideas troubleshooting it..