ns network simulator problems with running!

I have installed NS od FreeBSD , I used allinone 2-29.
It looks like having everything but it isn't working.
When I write ns there is......... I show everything better:

localhost# pwd
/usr/ns-allinone-2.29/ns-2.29
localhost# ns /usr/ns-allinone-2.29/ns-2.29/tcl/ex/simple-dyn.tcl
ns: Command not found.
localhost#

Can You tell me what is wrong????????

More than likely you will have to put the path to your ns executable in your PATH variable for your shell. You may also neet to insert the path to your otcl into your LD_LIBRARY_PATH environment and the path to your tcl library into your TCL_LIBRARY environment variable.

Cheers.

I did the PATHS :
then I .validate - it OK
then I made ./test-all-simple and I got:
All test output agrees with reference output.
So I got something like this:
localhost# pwd
/usr/ns-allinone-2.29/ns-2.29
localhost# ns simple-dyn.tcl
ns: Command not found.

what can be still wrong???????
where can I find is my paths alrigth??
sorry I am fresh from freeBSD and NS