Add this to your talkactions.xml, if it's not there already:
Code:
<talkaction words="alana res" filter="word-spaced" event="function" value="houseBuy"/>
<talkaction words="alana grav" filter="word-spaced" event="function" value="houseSell"/>
<talkaction words="alana sio" filter="word-spaced" event="function" value="houseKick"/>
<talkaction words="aleta grav" filter="word-spaced" event="function" value="houseDoorList"/>
<talkaction words="aleta sio" filter="word-spaced" event="function" value="houseGuestList"/>
<talkaction words="aleta som" filter="word-spaced" event="function" value="houseSubOwnerList"/>
And don't forget to
remove the existing house spells from spells.xml