bot.h(110) : error C2259: 'CRCBotPlugin' : cannot instantiate abstract class Options

[navid]

I'm trying to compile the RCBot 2 source code in Visual C++ 2008 Express Edition,
but I got many compile errors!!!

here is one:

c:\sourcesdk\src\utils\hpb_bot2\bot.h(110) : error C2259: 'CRCBotPlugin' : cannot instantiate abstract class
1> due to following members:
1> 'PLUGIN_RESULT IServerPluginCallbacks::ClientCommand(edict_t *,const CCommand &)' : is abstract
1> c:\sourceSDK\src\public\engine/iserverplugin.h(104) : see declaration of 'IServerPluginCallbacks::ClientCommand'
1> 'void IServerPluginCallbacks::OnQueryCvarValueFinished(QueryCvarCookie_t,edict_t *,EQueryCvarValueStatus,const char *,const char *)' : is abstract
1> c:\sourceSDK\src\public\engine/iserverplugin.h(112) : see declaration of 'IServerPluginCallbacks::OnQueryCvarValueFinished'

I tried to find any answer on google but I didn't find anything, I'm wandering how come no one has gotten this error since it is a compile error and any one trying to compile the source code should get the error!

I'd really appreciate your help.