problems installing ubuntu

I can boot to the cd just fine. It will take me to the ubuntu desktop. When I try to run the install icon on the desktop, nothing happens. This is version 6.10

I've never really used linux before.

When looking at the properties of the install icon, I found that the command is gksudo --desktop %k ubiquity gtkui

I tried to run that command from a terminal window and got:

Traceback (most recent call last):
   File "/usr/bin/ubiquity", line 166, in ?
      main()
   File "/usr/bin/ubiquity", line 161, in main
      install(sys.qrgv[1])
   File "/usr/bin/ubiquity", line 45, in install
      mod = __import__('ubiquity.frontend', globals(), locals(), frontends)
ValueError: bad marshal data

I'm downloading 7.04 while I'm typing this. I'll try that if I don't get any response soon. Thanks in advance for any help!