make sure the firmware is up to with the router. also make sure your laptop is connecting to that router and not a neighbors. make sure your router is broadcasting your ssid. U didnt tell us what kind of wireless router u have. if its a linksys u can also buy power gain antennas for that router to increase range. Try also to move the antennas on the router. dont have them face straight up. turn 1 facing the left and the other to the right. sorta like rabbit ears

try a linksys card for the laptop. my sisters inspiron 1000 came with a dell card that slides in the side. she was having connecting issues. i made her buy a linksys slide in card. she connects 54mbps and excellent signal strength. she is about 30 ft from router. and there are 2 walls in the way to the living room to her bedroom.