[ns] I can't run MPLS code on ns-allinone-2.29

[chau_ nad]

I install ns-allinone-2.29 folow instruction and output successfull
Set PATH, TCL_LIBRARY...
But I can't using test about MPLS
Example: test-reroute.tcl, test-lsp.tcl
I use: ns test-reroute.tcl
but error in "ns MPLSnode"
Thank for reading.