Can't navigate from different form

[nikel]

Hello, I have 2 forms in my app and want to navigate the webbrowser1 on MainForm using SettingsForm. Here's my code:

If MainForm.WebBrowser1.Url.AbsoluteUri Is "about:blank" Then
    MainForm.WebBrowser1.Navigate("http://www.domain.com")
End If

My code can't do this, what am I doing wrong?

EDIT: When I test with MessageBox.Show(MainForm.WebBrowser1.Url.AbsoluteUri) it shows me about:blank