big problem with Internet connection 2 portable!

Hello, I have a big problem with internet connection for my 2 portable wireless computers.le premier est un HP pavilion dv9051ea . the first is an HP Pavilion dv9051eathe second is my last purchase last week the asus A7 7004.

Let me explain. Everything worked well on my Internet connection since this weak in my HP.I have a netgear router dg834gt.Out since I connected the asus, I find it almost impossible to ever be able to share the internet connection on 2 . I tried to fixed ip but nothing happen . when I connect internet and put on my 2 pc at the same time, the computer tells me that there is no network .the router is 50 cm! Moreover It is well settled, with IP that are configured for all wireless accessories for home console, other computers, and no problem
I have the latest drivers.

Besides, when I'm logged on one a, another problem arises in my network.I have done a tests connection speed the Hp was 1575 kbs (normal) while the asus is a 373 .

Finally, I do not understand anything anymore.

PS: asus is a vista but I do a dual boot vista / XP. the problem remains the same for connection whatsoever with a 2 operating system, unfortunately.

It should perhaps be update drivers maps of your WiFi laptops.

configured the LB? after you put a fixed ip on 2 wifi cards, and good DNS .