Error in runtime module "Customer" is not installed

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Hello
I am having problem registering a C++ class as QML type.
Compilation haw no errors but on runtime i get the error that module "Customer" is not installed
Here is my code
customer.h
@class Customer : public QObject
{
Q_OBJECT

public:
explicit Customer(QObject *parent = 0);
Q_INVOKABLE void setQuery(const QString &query, const QSqlDatabase &db = QSqlDatabase());
Q_INVOKABLE void setQuery(const QSqlQuery &query);
QVariant data(const QModelIndex &index, int role) const;
Q_INVOKABLE QVariant datasingle(const QString &role) const;

Q_INVOKABLE bool openDB();
Q_INVOKABLE void generateRoleNames();

Q_INVOKABLE void closeDB();
Q_INVOKABLE bool insertNotes(const QString &title, const QString &category, const QString &note, const QString &modified, const QString &modifiedlocale);
Q_INVOKABLE bool updateNotes(const QString &title, const QString &category, const QString &note, const QString &modified, const QString &modifiedlocale, const int &noteid);



QSqlDatabase mydb;

signals:

public slots:

};@

customer.cpp
@Customer::Customer(QObject *parent) :
QObject(parent)
{

}@

main.cpp
@
#include <QApplication>
#include <QQmlApplicationEngine>
#include "customer.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

qmlRegisterType <Customer> ("Customer", 1,0, "Customer");
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:///main.qml")));


return app.exec();

}
@

CustomerList.qml
@
import QtQuick 2.1
import QtQuick.Controls 1.1

import Customer 1.0

Rectangle{
    width: 640
    height: 480
    color: "#212126"

    Customer {
        id: customer
    }

    Component.onCompleted: {
      customer.openDB();

    }

@

Anyone has any idea about the error?

Thanks in advance