BlitzUI - Finished and Free

need some help making a world editor for my game and well having some prob using blitzui

Case btn002
heightmapFilename$ = FileDialog( "Open File", CurrentDir(), ".bmp" )
If heightmapFilename$ > ""
If FileType( heightmapFilename$ ) = 1 And ( Right( Lower( heightmapFilename$ ), 4 ) = ".bmp")
SendMessage( txt002, "TM_SETTEXT", 0, heightmapFilename$ )
TERRAINNAME$=LoadTerrain(heightmapFilename$)
EndIf
EndIf
Case spn002
SendMessage( spn002, "SM_GETVALUE", Terxscale#)
ScaleEntity TERRAINNAME$,terxscale#/256,teryscale#,terzscale#/256
Case spn003
SendMessage( spn003, "SM_GETVALUE", Teryscale#)
ScaleEntity TERRAINNAME$,terxscale#/256,teryscale#,terzscale#/256
Case spn004
SendMessage( spn004, "SM_GETVALUE", Terzscale#)
ScaleEntity TERRAINNAME$,terxscale#/256,teryscale#,terzscale#/256



Like the terrain dosent seem to scale it only dissapers from the screen