(.text+0x6b13): undefined reference to function_name

hi
Dear ns-users
i use *”make clean”* and *”make”* for run trust based routing in DSR but i
give some error such this
help me please
this code is refer to Mr Leonard conard

dsr/dsragent.o: In function
`DSRAgent::returnSrcRouteToRequestor(SRPacket&)’:
dsragent.cc:(.text+0x8cf): undefined reference to
`TrustManager::initNewTrustValues(Path&, int)’
dsr/dsragent.o: In function
`DSRAgent::returnSrcRteForOutsideDomainToRequestor(SRPacket&)’:
dsragent.cc:(.text+0xd11): undefined reference to
`TrustManager::initNewTrustValues(Path&, int)’
dsr/dsragent.o: In function `DSRAgent::sendOutPacketWithRoute(SRPacket&,
bool, double)’:
dsragent.cc:(.text+0x1219): undefined reference to
`ACKMonitor::addACK(double, int*, int, double)’
dsr/dsragent.o: In function `DSRAgent::sendRouteShortening(SRPacket&, int,
int)’:
collect2: ld returned 1 exit status
make: *** [ns] Error 1
Best regards,