[ns] installation problem

dear all
i had installed ns-2.34 in fedora 13 but i get the following when i
execute my tcl script.please help it is urgent
[root@localhost allinone]# ns simw.tcl
num_nodes is set 2
invalid command name "-llType"
while executing
"-llType $val(ll) \
"
(file "simw.tcl" line 157)
[root@localhost allinone]#

with regards
sindhu