video is not the problem

when i go to the youtube site, only the top part of the page appears. the rest of the page will not appear. at the bottom of the window it reads looking up ad.doubleclick.net. pop up blockers are off. no zone alarm. i even tried turning off my spyware and anti virus programs with no success. the page does the same thing with them off.

i have no problems opening and using any other video sharing websites. the problem is they don’t have as much content as youtube.

any ideas on fixing this problem or recommend an alternative, thanks.
mozilla or ie both current, doesn’t work

windows xp version 2002 sp2

bought computer in feb 06
Adobe/Macromedia’s Flash players current
windows auto update is on and is current