"
Q. When ShowWeather set to HTC Weather, it does not show any icon?
A. You're probably running a custom-made HTC Home plugin. Try to figure out where the plugin is installed (e.g. \HTCHome\), then copy all HH_Weather_XXsmall.png files to \Windows\. Restart iLock2."
from
http://forum.xda-developers.com/showthread.php?t=353008
i did this and it worked for me, hope it works for you too. good luck
heatbball