[ns] Problem adding new mac protocol in ns

 Hello ns users!

I'm currently trying to integrate a new MAC protocol with ns-2.34.
The code was highly based on the existing implementation of Smac in ns.
I have edited some files (to add the new packet type etc.) and finished recompiling ns successfully.
Here are the files that I edited:
1. Placed X.cc and X.h in ns-2.34/mac/
2. packet.h and ns-packet.tcl
3. ns-default.tcl
4. cmu-trace.cc
5. ns-lib.tcl
However, when I tried running wireless simulations,I wasn't able to send packets successfully because the packet type was invalid.
It seems that I wasn't able to completely define the new packet type.
Can anyone help me?

Thanks in advance! :)