Big problem with internet cabel to transfer files?

Hello, hope you guys understand my english!

Im new in this WD live Hub world :slight_smile:

I will transfer my files with a internet cabel from my router to the WD box, but my computer cant see the box.

If i try to pull in the wifi dongle to the box, my computer fine see it, no problem.

But when i transfer its really slow… Thats why i will use a internet cabel. It works for about 2 hous ago, but when i put my box to my tv and back to my computer again, it could’nt see it again…

What do i wrong?