Dictionary between forums?

Question

I have two forums,Login and Game.
Login is used for logging in and it calls a dictionary from class "Clsdictionary"
So I use this on Form Login.

 clsDictionary UserSetCLS = new clsDictionary();

Then I add some Values and Keys to that Dictionary in the class,I'm using a class so this dictionary can be global/Shared between all my forms in that application.

ClsDictionary.cs code

       public Dictionary<string, string> UserSetSTRING = new Dictionary<string, string>();
       public Dictionary<string, int> UserSetINT = new Dictionary<string, int>();

Then in form login i add some keys and values

                    UserSetCLS.UserSetINT.Add("UserID", _UserID);
                    UserSetCLS.UserSetSTRING.Add("UserName", UserName);
                    UserSetCLS.UserSetSTRING.Add("CapitalName", CapitalName);

Now I have 3 entries.
1 for UserSetINT
2 for UserSetSTRING

At the end of all my code it switchs to form game.
I try to call back the entries that SHOULD be in the Dictionary

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Game
{
    public partial class frmCapitalCity : Form
    {
        clsDictionary UserSetCLS = new clsDictionary();
        string CapitalName;
        public frmCapitalCity()
        {
            InitializeComponent();
        }

        private void CapitalCity_Load(object sender, EventArgs e)
        {
            UserSetCLS.UserSetSTRING.TryGetValue("CapitalName", out CapitalName);
        }
    }
}

So that should take the dictionary entry "CapitalCity" and change the label I have to the string value of that.
But,When i call it back its Null. I'm wondering how could that be? I put it all in another Class so it can be used in every form in my application.

Basicly All i want to do is Get one Value from one forum to another.
On Login the Dictionary count is 3 with those three values and there keys.
When i call it back on Game the count is zero with no Entries!

Can anyone correct me in what i did? 
Or
Point me to a tutorial that goes over this Specific detail of what i want to do?

If you need me to clear anything up please post!
Thanks,
            Aaron