I used to get channel 46.1 46.2 and some other channel like the CW channel?

i used to live upstairs (this is a 2 story apartment complex im living in) and i had to move to another apartment downstairs, well i used to get 46.1, 46.2 and the cw channel when i lived upstairs but now i cant get them anymore since i moved downstairs, what is the problem with this, the landlord will not allow antennaes to be installed on the roof of the complex either. i have a rca converter box and i just have some antennae that someone gave me i dont know what the brand is called or anything.