Wi fi disconnect when in distance from home router
Hello so my problem is that when i am connecting to the internet via wi fi in the living room where the router is i have a full signal, but when i am bringing my Macbook ( 1.83 GHz, 2 GB RAM ) in my room the signal is lost and i can't connect it again, only if i'll go back to the living room. Any help will be really apreciated. Thank you in advance.
MacBook 1.83, Mac OS X (10.6.6)