Shadow issue when using a stationary light

Hi Guys having an issue that is driving me crazy

Stationary Light

This is the shadow I get when rendering using a stationary light in my scene. I am using a lightmap made in Maya but when i build using a moveable light the shadow is fine any help really appreciated

Moveable light

Try increase lightmap resolution (not for your oject but for the floor that is in contact with your building). If is a static mesh, increase the lightmap res but if is a brush decrese it.