patch for simple-rtp.tcl

["Randa" <randa@comp.lancs.ac.uk>]

Hi all,
	I have a problem when running simple-rtp.tcl with ns-2.1b3:
ns: _o3 run-mcast: invalid command name "0"
    while executing
"[$link set ifacein_] set intf_label_"
    (procedure "_o10" line 3)
    (Node get-oif line 3)
    invoked from within
"$self get-oif $link"
    (procedure "_o10" line 5)
 (Node init-outLink line 5)
    invoked from within
"$node init-outLink"
    (procedure "_o3" line 5)
    (Simulator run-mcast line 5)
    invoked from within
"_o3 run-mcast"


I copied the patches under ns installation problems:
ns-2.1b3.patch-intserv and ns-2.1b3-mcast.pch

Under ns-2.1b3 directory, I did distclean make and went to tcl/lib where
I put the patch files. 
I wrote:
patch < ns-2.1b3.patch-intserv , but I got the follwing errors:
patching file 'ns-lib.tcl'
Hunk #1 FAILED at 31
Hunk #1 FAILED at 427 
Hunk #1 FAILED at 437 
Hunk #1 FAILED at 446 
Hunk #1 FAILED at 569 
Hunk #1 FAILED at 577 

It is my first time to use patch so any help please.
Also are these the only 2 patches to solve the problem mentioned before.

Thanks in advance

Randa
randa@comp.lancs.ac.uk