[kalaslsl]

Hi, I bought a cheap Yahee mp4 player model: YHM-MP169C4,
the first time I connect it with a USB cable to my computer I had no problem at all, I transfer music to it and was able to listen to it with no problems,
I disconnect it the cable using the ''safely remove hardware option'',
from that time on my computer has not been recognizing my mp4 player,
if I connect it with the mp4 player off a message says:USB device not recognized, I go to My Computer and is not there, I then turn the mp4player on and the message goes away but nothing happens, I go to my computer and it doesn't appear there either, the mp4player only shows that is recharging the battery but I know that the battery being low is not the problem. I then try the installation disk and it says: ''wrong OS or OS version for application'' and when trying to install the driver from the disk it says:''Load library failed.The specified module could not be found''

I'm just confused why it worked perfectly the first time.I want to make clear that I can use the mp4 player to listen to the songs I have in there already but I wanted to transfer more to it from my computer but is not being recognized anymore, can someone help me with this?
Thanks in advance.