Hi Reza,
Please check the module help that is included with the module, and you might also want to check this tutorial: http://www.apollo-software.nl/Blog/tabid/169/EntryID/6/language/en-US/Default.aspx
Please note that you need to implement PageLocalization compatible skinobjects in your skin. The module includes ML versions of all core navigation skinobjects, and on top of that, you can use Snapsis NavMenu, as that is compatible as well.
Please also check out the sample skins that are included in the package you downloaded, as it will show you how an ML skin works
I don't know the specific skin you use, so i cannot help you with that. You might consider contacting the skin developer if you need help with modifying the skin (in case you are not able to do this yourself). Alternatively i could help you implement the module, but please appreciate that this is done agains our hourly rate for consulting.