I changed my laptop and hence moved to windows 7 OS. now with this (windows 7) I couldnt able to connect to VPN, basically it connect and stays connected for few seconds (20-25 odd seconds) and immidiately gets disconnected.. kindly help me out...

What is the disconnect code? Please check in the Application log in Event Viewer. After you get the code, please refer the following article to get the reason of the issue. List of Error Codes for Dial-up Connections or VPN Connections http://support.microsoft.com/kb/824864 Meanwhile I suggest you temporary disable antivirus and firewall then check if the issue still occurs.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.