clipboard sharing with XDM

[amr roushi]

I am trying to share the clip board of X and of Win2K . I start the 
session with
 xwin :portno  -query hostname -clipboard
I cannot share the clipboard using the different methods ie highlighting 
, Control Insert .
I tried xwinclip but it dies after 3 tries . I did xhosts + on the host 
for the above methods but still
no transfer from the Xwindow to Win2K .
your help is greatly appreciated it is quite a good feature . My target 
XDM machine is an AIX 5.2

thks n rgds .