Hello Samy-dt,
Please check the keyboard layouts selected on your Mac and your Windows Virtual Machine.
Follow the navigation below to find the keyboard layout selected on your Mac:
1. In Mac OS X, choose Apple menu > System Preferences and click Language & Text.
2. Click Input Sources.
3. Select the language or languages you want to use from the sidebar.
4. Select Show input menu in menu bar.
Note: The language you're selecting from the Input menu must be also available in Windows.
Please select the same keyboard layout on your Windows Virtual Machine.
Follow the steps as suggested at: http://kb.parallels.com/111674 to select the same keyboard layout on your Windows VM.
Let us know if you have any additional questions.
Last edited: Jun 13, 2014