Then, please try Sweet Home 3D version with runs with DirectX as explained in the FAQ, i.e. install again the 32 bit version of Sweet Home 3D, download the file SweetHome3D.l4j.ini, copy it in Sweet Home 3D installation folder (probably [font=courier new]C:\Program Files (x86)\Sweet Home 3D[/font]) and relaunch Sweet Home 3D.