Unusual state of internet connection on Ubuntu 11.10

view full story

http://askubuntu.com – I am currently working on ubuntu 11.10. I tried to upgrade it to 12.04 using the update manager. I am using a wifi connection. I get pretty good downloading and browsing speeds on my host machine which is a windows 7. However, i am not able to upgrade my version of ubuntu as i am getting only around 1 KBps speed on my VM while its more than 1 MBps on my host. Could there be something wrong.? I am using NAT for accessing internet on VM. History: I have tried upgrading it for like 10 times. In the first 2-3 attempts i got fine downloading speed but could not finish the complete upgrade due to (HowTos)