remote install help

hey guys, i have a question and hoping some can help. my friend sold me his macbook air and im trying to reinstall the OSX with remote installer (with imac superdrive). i follow the directions and for the life of me, when I restart the air (and pressing options) my network never shows up. i type in my network with (...) and the air never recognizes my wifi. the thing is that i'm always on my network, it just seems as if the air doesn't see my network when attempt to re-install.