IPC 160G THIN cannot found DFU after intall winusb.inf

[chestermax]

my ipc 160G  was buyed in july 2010,is it thin?

I turn into DFU and install the winusb.inf file,run UMSbootiPodClassic.exe,it say:no ipod classic dfu mode found.

I decompile for the exe,and found device PID is different number to condition of application。。。

SO，I install rockbox fail。。。