Connect to VPN via Sonicwall NetExtender

I was trying to connect to company's VPN via Sonicwall NetExtender. The version of NetExtender that I can get from my company is 3.5.629, which works fine in my Windows7 desktop, but it does not work in my Ubuntu 11.04. After doing Access Authentication, I was able to connect to server, but eventually I was logout, and the following are some error message I got.

Using SSL Encryption Cipher 'DHE-RSA-AES256-SHA'
Using new PPP frame encoding mechanism
pppd: no device specified and stdin is not a tty
SSL_read ZERO RETURN
SSL-VPN logging out...
SSL-VPN connection is terminated.
Exiting NetExtender client
Connection interrupted.  Reconnecting... 

I spent sometime Googling, and finally I found out the solution. In short, I need a newer version of NetExtender, which you can download it at  Sonicwall demo page,
https://sslvpn.demo.sonicwall.com/cgi-bin/welcome
(note that you need to use "demo" as username and "password" as password to login, and then click NetExtender to download it. I did that in Firefox, and it should popup the download link, and then you can use Active Manager to extract it.

Here are some note:
1. Before you install the newer version, you must uninstall the old version, if you already installed it. (Go to netExtenderClient folder, and run "sudo ./uninstall")
2. You need root to run netExtender (or, sudo ./netExtender)
3. You can also run sudo ./netExtenderGui (the one has user interface), but it may require java.

Hope this helps for someone who has the same problem.