Help Ran login Registration

NetClientLib_A.lib(s_NetClientMsgRegister.obj) : error LNK2019: unresolved external symbol "public: virtual __thiscall SERVER_UTIL::CRandomNumber::~CRandomNumber(void)" (??1CRandomNumber@SERVER_UTIL@@UAE@XZ) referenced in function "public: int __thiscall CNetClient::SndResetPin(char const *,char const *,char const *)" (?SndResetPin@CNetClient@@QAEHPBD00@Z)NetClientLib_A.lib(s_NetClientMsgRegister.obj) : error LNK2019: unresolved external symbol "public: bool __thiscall SERVER_UTIL::CRandomNumber::GenerateRandomString(class ATL::CStringT<char,class StrTraitMFC_DLL<char,class ATL::ChTraitsCRT<char> > > &,int,int,int,int)" (?GenerateRandomString@CRandomNumber@SERVER_UTIL@@QAE_NAAV?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@HHHH@Z) referenced in function "public: int __thiscall CNetClient::SndResetPin(char const *,char const *,char const *)" (?SndResetPin@CNetClient@@QAEHPBD00@Z)NetClientLib_A.lib(s_NetClientMsgRegister.obj) : error LNK2019: unresolved external symbol "public: __thiscall SERVER_UTIL::CRandomNumber::CRandomNumber(void)" (??0CRandomNumber@SERVER_UTIL@@QAE@XZ) referenced in function "public: int __thiscall CNetClient::SndResetPin(char const *,char const *,char const *)" (?SndResetPin@CNetClient@@QAEHPBD00@Z)



Help me guys in how to fix this 3 errors?, because im adding login registration in my source.

Thank u in advance

- - - Updated - - -

by the way this error is from the BASIC, when i compile the game.exe this 3 error pop up. help me please :)