ubun2

I have VirtualBox 3.0.12 r54655 installed on my ubuntu 64bit desktop machine. When i launched the virtual box, it prompted that there is an update available and pointed me to download the .deb file virtualbox-3.1_3.1.2-56127_Ubuntu_jaunty_amd64.deb and i downloaded the same.
 
When i right clicked on the file and selected "Open with GDebi Package Installer", it is giving me the following error message
 
Error: Conflicts with the installed package 'virtualbox-3.0'