The channels in your area require a VHF + UHF antenna. Start simple with something like this:http://www.radioshack.com/product/in...ductId=2103077
Lay the dipole rods as horizontally as possible.
Extend the dipole rods 36" each for Ch 6.
Extend the dipole rods only 27" each for Ch 12.
Use the loop for all the other channels.
If it doesn't work, return it and try something else. That's all you can do with indoor antennas - keep trying until you find one that works for you and the particular channels you want to receive. And reception is never guaranteed - especially indoors behind walls and windows.