how to rexec xterm from pc-x emulation (SCO XVision)

Hi is it possible to enable remote execution (rexec) of xterm from an pc-x emulation (SCO XVision 7.31) on suse 7.0 ? all i get is a "connection refused" message. I have to connect to linux via ascii-telnet and start xterm from the telnet-session. I dont want to start a full x-session via xdm/kdm (which works) but only few xterms seperately. Is there a way to start xterm direct via rexec ? Regards M. Rauter