Polo-Freak, Your player is using the Action Chipset ATJ2051 while most of these players use the ATJ2085 so the firmware you are trying may not suit your chip. I think you will have trouble finding a firmware to suit your player because of this. I suggest you contact your seller to see if he can send you a copy.
The other thing you should know is that according to it's data sheet the Samsung K9K8G08U0A is only a 1GB chip not a 4GB these player will only support a maximum of 2GB so you have been sold a hacked player and should take that up with your supplier as well.
http://www.samsung.com/products/semi...K9K8G08U0A.htm