[ns] ns problems!!

[lray]

I'm doing research on the IEEE802.21MIH.Several days ago, I got the
NIST module.  I need to use the module in the hsntg subdirectory.There
are two files in the module. One of them is in the file of
.../ns-allinone-2.29/ns-2.29/hsntg.The other one in the file of
.../ns-2.29/tcl/hsntg.I changed the directory to .../tcl/hsntg, run
the testMIH.tcl file.
$ ns testMIH.tcl
The error is:
    invalid command name "Handover/Simple"
    while executing
"Handover/Simple set debug_ 1"
    (file "testMIH.tcl" line 43)

I don't know how to solve the porblem.Please give me some
suggestion.Thank you very much!