no bitrate

Hi all
I have tried finding the solution to my problem both here on the forums and by googling and I just get so many different links that Im baffled. When searching for movies on limewire pro, all of the movies pop up, yet the majority of them have no bitrate in the bitrate box, and a couple of them do, yet judging by the size, arent the real deal as they download in about 2 seconds and are only 38kb roughly than the 800mb im used to. I dont know the technical way of explaining this, so thats the best way I know. It used to work fine till about 6 months ago, now I cant download any movie, no matter what I search for
Many thanks