vector of classes cloning problem

[realm]

I need to clone a vector of classes I have it so that it successfully clones but there is two errors: 1) upon exit it causes a crash which i take it is from an object already being deleted & 2) if I add a new object to the newely cloned vector it overwrites the first and last position of the vector.

This is what I have in my program.

I have 2 classes :

1- cnamevaluepair (which holds two string values)
2- cnamevaluepairlist( which has a vector of cnamevaluepair)

the vector def is showed in this typedef

typedef vector<CNameValuePair*> NVPLIST;
typedef vector<CNameValuePair*>::iterator NVPLISTITER;

I need to have the class clone itself from the main program with a call such as this:

new_list=old_list.clone();

So inside my cnamevaluepairlist.clone() I have this:

CNameValuePairList CNameValuePairList::clone()
{
  CNameValuePairList* temp2=new CNameValuePairList;
  string strValue;
  string strName;

  for (NVPLISTITER the_iterator=list.begin(); the_iterator != list.end(); the_iterator++)
  {
    strValue=(*the_iterator)->getValue();
    strName=(*the_iterator)->getName();
    temp2->add(strName,strValue);
  }
  return *temp2;
}

the list variable is of NVPLIST type. Inside my add(strName,strValue) function i have the following:

CNameValuePair* temp2=new CNameValue(strName,strValue);
list.push_back(temp2);

Do you know what I am doing wrong to cause the 2 errors stated earlier?