WD MyBook 1140 Doesn't Show up in My Computer

Help please.

I very recently bought the WD MyBook 1140 2tb. After connecting it to my laptop and finding it working okay, I transfered about 20 Gb of pictures and docs to it.

After that first time – I cannot access the drive. It does not show in my Win Explorer as a drive – its completely invisible.

However, as stated above, the driver seems to be working correctly and the Driver Manager does see and report that the drive is ‘working properly’.

So – how do I access it?? I mean really. This is brand new and the 20 Gb of data is important.

There seems to be something in the MyBook that is cloaking it. 

Help please. This is exceptionally frustrating as my first experience with a WD drive.