I'm not able to uninstall Xmap

[whitetiger]

I tried to install Xmap into my J2.5.4 website and there was some errors.
So I tried to uninstall it for a new installation.
Nothing!

I tried also to remove the folders xmap in modules, components and administrator but I've still problems.
At the moment there are none folders into website and none table in MySQL, but in the Joomla list of the component I've even TWO reference of Xmap.

Can you help me?
Thanks