The first thing you should check is if the dimension values of the dimension assigned to the element are 'visible' (Show as Tile) http://prntscr.com/9lwlra
MI will only display tiles on the home page for dimension values that are set to 'visible'. To find the current settings, edit your dimension (http://img.mtrc.in/100d0J0b0H3k) and then check the dimension values grid at the bottom fo the page (http://img.mtrc.in/1y0s1i2C1p2A). You can adjust the visibility settings individually (http://img.mtrc.in/3J1o0v1H1p0H) or en masse (http://img.mtrc.in/251s2A1S0m39).