[ns] problems with wireless

[lewapryb]

 tried to simulate wireless-mitf.tcl and I got sth like that:  
  
 localhost# 
ns /usr/ns-allinone-2.29/ns-2.29/tcl/ex/wireless-mitf.tcl  
 num_nodes is set 2  
 INITIALIZE THE LIST xListHead  
 Starting Simulation...  
 channel.cc:sendUp - Calc highestAntennaZ_ and distCST_  
 highestAntennaZ_ = 1.5, distCST_ = 550.0  
 SORTING LISTS ...DONE!  
 NS EXITING...  
 localhost#  
  
 Can You tell me why I can't see anything? 
And how Can I see anything??