Scanning analog channels does not work

[dhanjel]

MediaPortal Version: 0.2.1.0 SVN 10-28-2006--00-59-Rev11370
MediaPortal Skin: BlueTwo Wide
Windows Version: Windows XP Pro SP2
CPU Type: Intel Core 2 Duo E6300 1.86GHz
HDD: Maxtor DiamondMax 160GB S-ATA
Memory: 1024MB DDR2
Motherboard: Gigabyte GA-965P-S3
Motherboard Chipset: Intel P965 Express / Intel ICH8
Motherboard Bios: F5
Video Card: Sapphire Radeon X1600PRO 256MB, HDMI
Video Card Driver: ATI Catalyst 6.8
Sound Card: Onboard, Realtek ALC883 8 Channel Audio Codec
Sound Card AC3: Coaxial out
Sound Card Driver: Latest availab.e
1. TV Card: Twinhan
1. TV Card Type: DVB-C
1. TV Card Driver: 1.2.3.8
2. TV Card: Hauphauge PVR-150
2. TV Card Type: Analog
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: MPV
MPEG2 Audio Codec: MPA
Satelite/CableTV Provider: Comhem, Sweden
HTPC Case: Ahnix D.Vine 5
Cooling:
Power Supply: SilenX mATX 350W
Remote: Microsoft MCE Remote
TV: Samsung LE-32S71
TV - HTPC Connection: HDMI

Scanning of analog channels does not work for me in the tv server configuration tool, when I press the 'Scan' button, the following error is logged:

I have two network servers, but the error appears both when trying to scan on the master and slave server (analog card is located on the slave server).

2007-01-06 15:18:00 Exception   :System.NullReferenceException: Object reference not set to an instance of an object.
   at SetupTv.Sections.CardAnalog.mpButtonScan_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
2007-01-06 15:18:00 Exception   :Object reference not set to an instance of an object.
2007-01-06 15:18:00   site      :Void mpButtonScan_Click(System.Object, System.EventArgs)
2007-01-06 15:18:00   source    :SetupTv
2007-01-06 15:18:00   stacktrace:   at SetupTv.Sections.CardAnalog.mpButtonScan_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)