Win+Shift+Esc shortcut for task manager only works on the left side ?

I recently installed Win 8 Enterprise 90 days trial using Virtualbox.

I tried Ctrl+Shift+Esc to bring up the task manager, but it apparently works on only the left ctrl and left shift keys..

Is this a bug or intentional ?

Update: Omg, fatal typo. I meant Ctrl+Shift+Esc. Sorry.