[UDT] UDT simulation problem

[venkatrao n. <ven...@gm...>]

 Hi,
I got some errors , while excuting UDT simulation scripts. I was
followed insrstiuction as given in UDT documantation simulation script, even
thought i was getting errors like given below .( I have done all changes,
but i did't find where Agent/UDT is defind)

* PATH: ./ns-allinone-2.26/ns-2.26/udt/ (ns test.tcl)
Error 1 :* invalid command name "Agent/UDT"
while executing
"Agent/UDT set mtu_ 1500"
( file "test.tcl" line 3)

.*/ns-allinone-2.26/ns-2.26/udt ( ns sim.tcl)
Error 2:*
invalid command name "Agent/UDT"
while executing
"Agent/UDT create _o52 "
invoked from within
"catch "$className create $o $args" msg"
invoked from within
"if [catch "$className create $o $args" msg]
{
if [string match "__FAILED_SHADOW_OBJECT_"
$msg] {
delete $o
return ""
}
global errorInfo
error "class $..."
(procedure "new" line 3)
invoked from within
"new Agent/UDT"
(procedure "build-udt" line 4)
invoked from within
"build-udt $na $nb 1500 100000 0 0"
( file "sim.tcl" line 117)

if any one know about how to overcome these errors ,
please reply.....