Import variables from a message

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Hello,

In my code I would like to get a variable from my message and use this in my main. Whenever I run this code "x" is said to be 0.00. This should be a different number. In my message I declare my variables as float32. I feel like I don't use x = msg.x the proper way. I know that my message is being send the right way. Because in a different code I was able to ROS_INFO_STREAM(x). This showed that it receives the right x value. Could someone please look at my code and hopefully see where I make a mistake?

#include <iostream>
#include <ros/ros.h>
#include <moveit/move_group_interface/move_group.h>
#include <sstream>
#include <ur5_inf3480/Coor.h>

using namespace std;

class MoveRobot {
    public:
        double x;
    double y;
    double z;
    double roll;
    double pitch;
    double yaw;
    double a;
    void PublishCoordinatesCallback(const ur5_inf3480::Coor msg);
};

void MoveRobot::PublishCoordinatesCallback(const ur5_inf3480::Coor msg) {
    x = msg.x;
    y = msg.y;
    z = msg.z;
    roll = msg.roll;
    pitch = msg.pitch;
yaw = msg.yaw;
a = msg.a;
}

int main(int argc, char **argv) {
    ros::init(argc, argv, "coordinates");
    ros::NodeHandle nh;
    ros::Rate loop_rate(30);
    MoveRobot moverobot;
    ros::Subscriber sub = nh.subscribe<ur5_inf3480::Coor>("topic_subscribed", 1, &MoveRobot::PublishCoordinatesCallback, &moverobot);
    while (ros::ok())
    {
        ROS_INFO("This is x: %.2f", moverobot.x);
    }
    loop_rate.sleep();
    ros::spin();
    return 0;
}

I hope I won't ask a question which has been asked already. I tried to search the forum and the internet first but I can't find a solution. Thank you for your answers!