mp3 player problem

[MoRcHeEbA]

ok, so I've got this mp3 player and when I first got it I installed the drivers and everything and it was all fine. When I went to my computer it gave me a new drive I guess cause of the usb port and I just clicked and draged the songs onto that drive and it uploaded to the player. Well now when I went to add more songs to it I connected it to the usb port and everything and now I can't do anything. I can't add songs for some reason, like my mp3 player isself says it's connected to the usb but there's no response on the other end at the computer. Is there a way I can check whats connected to my usb ports? Also I reinstalled the drivers and everything and still nothing... any help would be greatly appreciated

if the model type helps it an RCA LYRA 1075