C2440 & C2439 Errors

   The following code fails to compile (VC6.0; errors C2440 & C2439),
and the offending code is the "find_if" line in main. (As with most MS
error diagnostics,) I can't make any sense out of the messages and don't
know what to do to correct the errors. Please advise. TIA

#pragma warning (disable:4786)
#include <map>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

typedef struct ChipRec
{
    int bibNum;
    string entName;
} tData;
typedef multimap<string, ChipRec> CHIPINFO;
    CHIPINFO mmci;
    multimap<string, ChipRec>::iterator cIter;

    tData tWork;
    tData qWork;
typedef map<int, ChipRec> BCI;
    BCI bci;
    map<int, ChipRec>::iterator bIter;

class NameMatch
{
    string m_name;
public:
    NameMatch(string const &name) : m_name(name) {}
    bool operator()(const map<int, ChipRec>::value_type const &v)
const
    {
        string nameWork;
        nameWork = v.second.entName;
        return nameWork == m_name;
    }
};

int main()
{
    string tStr = "The Phantom Spitter";
    CHIPINFO::iterator it = find_if(mmci.begin(), mmci.end(),
                                        NameMatch(tStr));
    return 0;
}