installing Ubuntu 14.04

[Lenny]

Hi,
I am trying to install Ubuntu 14.04, and I cannot get past the screen where 
I have to check for updates and agree to third-party software.
The continue box does not appear, the only two options are back or quit.
I can go back and forward again, but the window still has the same problem.
I am connected to my WIFI.
In fact, I was before I started the install, and it asked me to enter my 
router password again, and I did.
I did alt + F10 and noticed that I am indeed connected to my router.
What would cause this?
Thanks.

Glenn