open adobe illustrator application

[chidambaram]

hi everybody,

i need to open an adobe illustrator document using VB.NET.

My code is

        Try
            Dim illusapp As New Illustrator.Application
            Dim illusdoc As Illustrator.Document
            'illusapp.Visible = True
            illusdoc = illusapp.Open("C:\Documents and Settings\Acer OEM User\Desktop\Sample\one.eps")
            illusdoc.Activate()
        Catch ex As Exception
            MsgBox(ex.ToString())
        End Try

If illustrator application is already opened then the specified file is open and visible to us.

But if the application is not opened previously then the file is not visible to us.

i cant able to set the visible property. It shows the error as "Read only property"

How can i make it as visible?

Thanks in advance....