Can you see your network name in the Airport menu on your Macbook?
Do other wireless devices connect to your wireless router without problems?
Can your MacBook connect to OTHER wireless networks at all? (Starbucks, bookstore, etc?)
Note - your Airport Utility will ONLY see Apple Airport Base Stations. That is its only purpose in life. It will not do anything with a netgear router, and can't see it. It is not designed to work with any other brand of router.