Make sure you follow the directions carefilly when creating the symbol. Be sure when you are editing the symbol you DE-SELECT everyting before you attatch the light info record. If you have something selected in the symbol and then attach the record, the record will be attached to that object and not the symbol def. Also try moving the focus point, there are some lighting angles that it can not calculate, you should get an error message that says Can not calculate, angle must be larger then xxx