[ns] [scheduler.o] Error1

["Nino.Kubinidze" <Nino.Kubinidze@ul.ie>]

Hi,
I installed MNS version 2.0 on the top of ns-2.1b7a.
When I run "make depend" I get:
emulate/either.cc:46:net/ethernet.h: No such file or directory
emulate/arp.cc:50: net/either.h: No such file or directory

When I run "make" I get such an error:
.../ns-allinone-2.1b7a/include -o scheduler.o scheduler.cc
In file included from scheduler.cc:46:
packet.h:135: redefinition of 'enum packet_t PT_LDP'
packet.h:126: 'enum packet_t PT_LDP' previously defined here
make:*** [scheduler.o] Error 1

How to get read of these errors?
Thanks in advance

Nino