Trial version software cannot uninstall from Add remove program (Control Panel)

I had install Trial version of Corel Draw (R) Graphics Suit X5 1 month back. I am using software for 12 days from installation.
Then some serious error occurs in software. So I decide to Uninstall this application. I start uninstall process – control panel –Add remove programs – but I could not Remove this software. Then I start to reinstall this application but it could not work.
So How to solve this error from my computer?
