[ns] Manual routing - add-route

[pdommay@ribera.tel.uva.es]

Continuing with the problem i mention on previous post, and to 
simplify the question, i'm trying to use command add-route to 
configure my tables. I have nodes in a simple square like this...

n0 ------ n1 ------ n2 ------ n3
|______________________________|

and i want to send information between n0 and n1 trough n3-n2. I 
write this code

$ns rtproto Manual

$n0 add-route [$n1 id] $n3
$n1 add-route [$n1 id] $n2
$n3 add-route [$n1 id] $n1

and the simulation starts without any error but stops at the first 
step. Anybody knows what am i doing wrong??

Thanks again for any help Smile.

Pablo.