Thanks Mr R2D2 for your guide, here is the result for some of the test
1) Try with another computer >>> same result still can't acces, they install drives but still appear unallocated in disk management and not appear as partition in "my computer"
2) Reinstall Driver >>> no change happen
3) Other OS >>> darn I hope I can find the one with it, can I install linux in my windows 7 laptop?
Mean while i'll try the other method you mentioned, I already contacted WD about this and glad my warranty stilll valid hope I can recover some of data if worse case occur. 8++ gb of data .... T____T
I'll be back thank you Mr R2D2