Room Submit Error

19: error: overloaded method value apply with alternatives:
  (in: net.liftweb.common.Box[b.rooms.MyType])com.thinkwellgroup.brandlabcms.model.Brandlab <and>
  (in: b.rooms.MyType)com.thinkwellgroup.brandlabcms.model.Brandlab
 cannot be applied to (com.thinkwellgroup.brandlabcms.model.Room)
              b.rooms(r)