In the properties for this place you have latitude 41*53'08,12", longitude 87*37'58,32". You need to indicate whether the latitude is North or South of the equator and whether the longitude is East or West of the Greenwich Meridian. By default latitude is assumed to be North and Longitude East. Also at present the routine does not recognize comma , as the decimal separator so the point symbol, or full stop . must be used instead.
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So you should have latitude 41*53'08.12"N, longitude 87*37'58.32"W for Chicago. You can of course use the degree sign ° (Alt+0176 on the number pad) instead of * and use positve and negative values instead of N E S & W.
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