[ns] ns error invalid command name "Node/DelayBox"

[renuka uday prabhu]

Dear ns-users
I am using ns-2.33 version installed on Cygwin . It was working fine. Now I tried to add Cluster Based Routing Protocol(CBRP), the source code for which I got from the internet for  version 2.1b5. I modified the code and removed all the errors to fit for the new version. I modified the makefile.in to include the cbrp/.o files.Then I executed ./configure
make clean and make. 
Everything was o.k. But when I run ns by typing ns at the command prompt,after setting the env. variables ,I get the following error

code omitted because of length 
:invalid command name "Node/DelayBox"
while executing 
"Node/DelayBox instproc init args {
eval $self next $args
$self instvar db_classifier_
set db_classifier_ [new Classifier/DelayBox ]
$self insert-etr..."
 invoked from within "if {[ns-hasSTL]==1} {
Simulator instproc set-nix-routing{}
Simulator set nix-routimg 1
Node enable-module "Nix"
}
Simulator instproc get-link-...."

Can anyone please help me out in this regard. 
nam and startx commands are working properly. I tried to edit the makefile.in in different ways but not successful. Is there anything that I should do specifically for cygwin version
Thanx
renuka