how to do?

[gamecocks]

class myClass
{
public:
     myClass();
     myClass(myClass&);
     myClass& operator = (myClass&);
     mySubClass * pSubClass
     const char* getName();
     void  setName(const char*);
     int   getValue();
     void  setValue(int);
private:
     char* szName;
     int nValue;
}
myClass::myClass()
{ 
     szName=new char[16];
     strcpy(szName,"unknown");
     nValue=-1;
     pSubClass=new mySubClass;
     return; 
}
myClass::myClass(myClass& CValue)
{
     szName=new char[16];
     strcpy(szName,CValue.getName());
     nValue=CValue.getValue();
     pSubClass=new mySubClass;
     pSubClass=CValue.pSubClass;
     return; 
}
myClass::myClass::operator=(myClass& CValue)
{
     szName=new char[16];
     strcpy(szName,CValue.getName());
     nValue=CValue.getValue();
     pSubClass=new mySubClass;
     pSubClass=CValue.pSubClass;
     return *this; 
}

myClass::~myClass()
{ 
     delete [] szName;
     delete pSubClass;
     return; 
}
class mySubClass
{
public:
     mySubClass();
     mySubClass(mySubClass&);
     mySubClass& operator = (mySubClass&);
     const char* getName();
     void  setName(const char*);
     int   getValue();
     void  setValue(int);
private:
     char* szName;
     int nValue;
}
mySubClass::mySubClass()
{ 
     szName=new char[16];
     strcpy(szName,"unknown");
     nValue=-1;
     return; 
}
mySubClass::mySubClass(mySubClass& CValue)
{
     szName=new char[16];
     strcpy(szName,CValue.getName());
     nValue=CValue.getValue();
     return; 
}
mySubClass::mySubClass::operator=(mySubClass& CValue)
{
     szName=new char[16];
     strcpy(szName,CValue.getName());
     nValue=CValue.getValue();
     return *this; 
}
mySubClass::~mySubClass()
{ 
     delete [] szName;
     return; 
}
other member function.
void myFunction(myClass&CValue)//fill CValue
{
}
int main(int argc, char* argv[])
{
	class myClass CMyClass;
                myFunction(CMyClass);
	return 0;
}

Why I get Debug error: DAMAGE after normal block(#66) at 0x00894120? What is wrong with it? How to fix it? Thanks