Refresh combobox values whenever new entry is added in VB

See more:

VB

MySQL

I am trying to get my combo box to refresh and have new values(name) automatically whenever the user adds new data to the database from a separate form (LoanForm).

Goal: The ComboxBox should reflect new names after adding new data from LoanForm. Screenshot: https://snipboard.io/CjBTAN.jpg

Screenshot LoanForm: https://snipboard.io/2HdkIt.jpg
(LoanForm adding data works perfectly)

What I have tried:

I wrote a code that makes the comboBox reflect values after adding from another form, so when I navigate to "collections form" and search their name it should reflect: Screenshot: https://snipboard.io/AMcr3V.jpg

The code for ComboBox:

 Private Sub ComboBox1_Click(sender As Object, e As EventArgs) Handles ComboBox1.Click
    MysqlConn = New MySqlConnection
    MysqlConn.ConnectionString = "server=localhost;userid=root;password=root;database=golden_star"
    Dim da As New MySqlDataAdapter
    Dim dt As New DataTable
    Dim query As String
    MysqlConn.Open()
    query = "select * from loan"
    Command = New MySqlCommand(query, MysqlConn)
    da.SelectCommand = Command
    da.Fill(dt)
    ComboBox1.DataSource = dt
    ComboBox1.DisplayMember = "account_name"
    MysqlConn.Close()
End Sub

But the code to refresh new values doesn't work until I run the program which I don't want that.

I have another code that allows users to bind data from comboBox to textbox according to name selection but if I do input the above code for refresh values the binding of data to textbox doesn't work. Two of them don't work unless I remove one of them. Can anyone assist me with what went wrong?
Thank you.