calling dll

[Pirate]

guys ,Could anyone hlep me to get out of this hell ?
I am calling a dll method which is "Navigate" and "Navigate2" from my class "Navigation" but it keeps firing this error which damn says :

an unhandled exception of type "InvalidActiveXStateException" occurred in axinterop.shdocvw.dll

when I call this method from the form it's fine.
Don't you think this have to do with inheritence :
I tried this :

Imports AxSHDocVw.AxWebBrowser
Public Class Navigation
    Public Shared MyWeb As New AxSHDocVw.AxWebBrowser()
 
    Public Shared Function Back() As String
        MyWeb.GoBack()
    End Function
 
    Public Shared Function Forward() As String
        MyWeb.GoForward()
    End Function
 
    Public Shared Function Go() As String
 
    End Function
 
    Public Shared Function Refresh() As String
        MyWeb.Refresh()
    End Function
 
    Public Shared Function Stopp() As String
        MyWeb.Stop()
    End Function
 
    Public Shared Function Home() As String
        MyWeb.GoHome()
    End Function
 
    Public Shared Function Navigate() As String
        Dim nullObject As System.Object = 0
        Dim URL As Object
        Dim Str As String = ""
        Dim nullObjStr As System.Object = Str
        Cursor.Current = Cursors.WaitCursor  ' Navigate to location found in textbox         
        MyWeb.Navigate2(URL, nullObject, nullObjStr, nullObjStr, nullObjStr)
        Cursor.Current = Cursors.Default
 
        'or you can safely use this :
        'MyWeb.Navigate("www.home.com")
 
    End Function
 
End Class