skydrive desktop version isn’t uploading and not even showing icon in notification area..

I'm using skydrive desktop, its saving items in its directory but not running and not even uploading.

The following error occurred whenever it is started.

On PC skydrive folder is visible and most of new items have been saved.

as you can see everything is in its place, its not working, not signing in, not synchronizing..

Please help me, i'm worried too much..