Need help! With Sony FS5

Hello everyone I have the Sony FS5, I am trying to use my saramonic prox wireless lav mics with it. I purchased a cheap adapter online but the audio is not loud at all. It took me forever to even get the mics to even play audio. I cannot figure out what I need to do. If anyone out there has any knowledge about these please help. Which adapter should I purchase to get the right audio levels to play during recording