Access is denied to the network printers for ASP.NET app

See more:

VB

printing

network

I have instaled asp.net application on a server. I want to display network printers in a dropdown and i use this codes to achive that goal:

Protected Overrides Sub LoadPrinters()
Dim permison As New PrintingPermission(PrintingPermissionLevel.AllPrinting)

If Not IsPostBack Then
Dim strPrinter As String
Dim li As ListItem
dlPrinters.Items.Clear()
dlPrinters.Items.Add(New ListItem("Select Printer", ""))

For Each strPrinter In System.Drawing.Printing.PrinterSettings.InstalledPrinters
dlPrinters.Items.Add(strPrinter)
Next
End If

Also i try this code:

Private Sub PrinterList()  
   
  
    ' USING WMI. (Windows Management Instrumentation)  
    Dim objMS As System.Management.ManagementScope = _  
        New System.Management.ManagementScope(ManagementPath.DefaultPath)  
    objMS.Connect()  
  
    Dim objQuery As SelectQuery = New SelectQuery("SELECT * FROM Win32_Printer")  
    Dim objMOS As ManagementObjectSearcher = New ManagementObjectSearcher(objMS, objQuery)  
    Dim objMOC As System.Management.ManagementObjectCollection = objMOS.Get()  
  
    dlPrinters.Items.Clear()  
    dlPrinters.Items.Add(New ListItem("Select Printer", ""))  
  
    For Each Printers As ManagementObject In objMOC  
        If CBool(Printers("Local")) Then                        ' LOCAL PRINTERS.  
            dlPrinters.Items.Add(Printers("Name"))  
        End If  
        If CBool(Printers("Network")) Then                      ' ALL NETWORK PRINTERS.  
            dlPrinters.Items.Add(Printers("Name"))  
        End If  
    Next Printers  
End Sub  

In both scenarios i cannot see network printers in the dropdown list and if i use second code i can see error: Access is denied.
 
My application is using impersonate account with full permision to the network and printers. What else can make the problems? 

What I have tried:

I try many examples how to read the printers but it is not working