Use the link below to set the alignment for your satellite dish. If your city is not listed, use the two closest locations and estimate the settings for your area.
http://www.satlex.de/en/azel_calc.html

Enter your coordinates of longitude and latitude if you have those available.  Otherwise, you can select your city, or the next nearest city to your location.  Be sure to select AMC-18/SES-11 in the table located at 105* West!  Then simply select the Calculate button and the webpage will display your Azimuth and Elevation as well as diagram of the orbital slot in relation to your location.