C++ vector object access

I am having trouble to access object in c++ vector. The vector is declared to hold custom class.

Class is defined as following:

class SPMgmt {
private:
    vector<Part> partList;
    vector<Supplier> supplierList;
public:
    SPMgmt();
    SPMgmt(fstream&, fstream&);

    void listPart();
    void listSupplier();
    void searchPartBySupplierName(string);
    void searchSupplierByPartCode(string);
    void addNewPart();
};

And its constructor is not working right:

SPMgmt::SPMgmt(fstream& supplierFile, fstream& partFile){
    string name, code, phone, streetAddr, cityStateZip;

    while(std::getline(supplierFile, name)){
        std::getline(supplierFile, code);
        std::getline(supplierFile, phone);
        std::getline(supplierFile, streetAddr);
        std::getline(supplierFile, cityStateZip);

        Supplier newSupplier(name, code, phone, streetAddr, cityStateZip);

        // get_name() prints out supplier name
        cout<<"Name: "<<newSupplier.get_name()<<endl;

        // try to put object newSupplier to the vector
        supplierList.push_back(newSupplier);

        // PROBLEM: get_name() here did not print name. It prints empty string. 
        cout<<"Name: "<<supplierList[0].get_name()<<endl;
    }   

My question is: why the object stored in vector did not print its name properly? I can just use the get_name() function to print its name before push_back() it to the vector.

Your help is greatly appreciated.