Using the ccRTP project

Dear David!
I use MSVC++ to compile the ccRTP project. During the compilation
process, the following errors occur:

Linking...
1>control.obj : warning LNK4075: ignoring '/EDITANDCONTINUE' due to '/INCREMENTAL:NO' specification
1>   Creating library .\Debug/ccrtp1.lib and object .\Debug/ccrtp1.exp
1>incqueue.obj : error LNK2019: unresolved external symbol "public: __thiscall ost::CryptoContext::~CryptoContext(void)" (??1CryptoContext@ost@@QAE@XZ) referenced in function "public: void * __thiscall ost::CryptoContext::`scalar deleting destructor'(unsigned int)" (??_GCryptoContext@ost@@QAEPAXI@Z)
1>outqueue.obj : error LNK2001: unresolved external symbol "public: __thiscall ost::CryptoContext::~CryptoContext(void)" (??1CryptoContext@ost@@QAE@XZ)
1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void __thiscall ost::CryptoContext::srtpAuthenticate(class ost::RTPPacket *,unsigned int,unsigned char *)" (?srtpAuthenticate@CryptoContext@ost@@QAEXPAVRTPPacket@2@IPAE@Z) referenced in function "public: void __thiscall ost::OutgoingRTPPkt::protect(unsigned int,class ost::CryptoContext *)" (?protect@OutgoingRTPPkt@ost@@QAEXIPAVCryptoContext@2@@Z)
1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void __thiscall ost::CryptoContext::srtpEncrypt(class ost::RTPPacket *,unsigned __int64,unsigned int)" (?srtpEncrypt@CryptoContext@ost@@QAEXPAVRTPPacket@2@_KI@Z) referenced in function "public: void __thiscall ost::OutgoingRTPPkt::protect(unsigned int,class ost::CryptoContext *)" (?protect@OutgoingRTPPkt@ost@@QAEXIPAVCryptoContext@2@@Z)
1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void __thiscall ost::CryptoContext::update(unsigned short)" (?update@CryptoContext@ost@@QAEXG@Z) referenced in function "public: int __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" (?unprotect@IncomingRTPPkt@ost@@QAEHPAVCryptoContext@2@@Z)
1>rtppkt.obj : error LNK2019: unresolved external symbol "public: unsigned __int64 __thiscall ost::CryptoContext::guessIndex(unsigned short)" (?guessIndex@CryptoContext@ost@@QAE_KG@Z) referenced in function "public: int __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" (?unprotect@IncomingRTPPkt@ost@@QAEHPAVCryptoContext@2@@Z)
1>rtppkt.obj : error LNK2019: unresolved external symbol "public: bool __thiscall ost::CryptoContext::checkReplay(unsigned short)" (?checkReplay@CryptoContext@ost@@QAE_NG@Z) referenced in function "public: int __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" (?unprotect@IncomingRTPPkt@ost@@QAEHPAVCryptoContext@2@@Z)
1>Debug/ccrtp1.dll : fatal error LNK1120: 6 unresolved externals

Could you help me to solve these problems? 
Could you describe the compilation procedure under MSVC++ step-by-step?

Thank you in advance,
Alex