Where's my droid App doesnt work on my incredible
 

I installed this app "wheres my droid" from my wifes phone, she has the droid incredible. I turned on both GPS settings in her phone, I changed the attention word for GPS, but when I send her a text with the attention word, nothing ever comes back. I want to be able to see where she is every now and then and get her location. It seems to work fine on my droid x. Any ideas, thanks.