How come one of the laptops in my office can find the wireless network upstairs (on another floor), but not the one on my floor? If I take the laptop upstairs it finds MY wireless network, but not the one upstairs??

Other laptops that I have work as expected, they find the closest network available (ie the one on my floor).

Any ideas?

Thanks

[Edited on 7/8/2008 by je1972]