[ns] Problem regarding simulation in MANets

[Nadeem Javaid]

Hello ALL,
When I run tcl script example from, 
http://www.isi.edu/nsnam/ns/tutorial/nsscript5.html ,
I get following output 

[root at localhost ns-allinone-2.33]# ns simple-wireless.tcl
num_nodes is set 2
INITIALIZE THE LIST xListHead
INITIALIZE THE LIST xListHead
Starting Simulation...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5,  distCST_ = 550.0
SORTING LISTS ...DONE!
SORTING LISTS ...DONE!
NS EXITING...
[root at localhost ns-allinone-2.33]# 

Can anybody please help in this regard that why dodnt I get simulation running ?
 Regards,
Nadeem