Color Problems

Since I couldn't isolate any area of the code here's the whole thing.

Strict;

Const TILE_WIDTH=96;
Const TILE_LENGTH=60;
Const TILE_HEIGHT=12;
Const TILE_TOP=48;

Const SCREEN_WIDTH=800;
Const SCREEN_HEIGHT=600;

Graphics SCREEN_WIDTH,SCREEN_HEIGHT,32,60
SetMaskColor 255,0,255
SetBlend MASKBLEND
HideMouse()

Type Tile

	Field graphic
	Field passable:Int
	Field reachable:Int
	Field targetable:Int
	Field animated:Int
	Field event:Int
	Field height:Int
	Method AnimateTile()
	End Method
End Type;

Type BattleMap
	Field name:String
	Field width:Int
	Field length:Int
	Field height:Int
	Field slideX:Int
	Field slideY:Int
	Field Map:Tile[,]
	
	Function Create:BattleMap(area:String)
		Local b:BattleMap=New BattleMap
		b.name:String = area
		Local inFile=ReadStream("Maps/"+b.name+".dat")
		b.width=Readint(inFile)
		b.length=Readint(inFile)
		b.height=Readint(inFile)
		Local numTiles=Readint(inFile)
		Local allTiles=LoadAnimImage("Maps/"+b.name+"Tiles.png",TILE_WIDTH,TILE_LENGTH,0,numTiles,MASKEDIMAGE|DYNAMICIMAGE)
		b.Map=New Tile[b.width, b.length]
		For Local xx:Int = 0 To b.width-1
			For Local yy:Int = 0 To b.length-1
				b.Map[xx,yy]=New Tile
				b.Map[xx,yy].height=Readint(inFile)
				If b.Map[xx,yy].height>0 Then
					b.Map[xx,yy].graphic=CreateImage(TILE_WIDTH,(TILE_TOP+(TILE_HEIGHT*b.Map[xx,yy].height)),1,MASKEDIMAGE);
					SetColor(255,0,255)
									
					For Local j = 0 To ImageHeight(b.Map[xx,yy].graphic)
						DrawLine 0,j,TILE_WIDTH,j
					Next
					For Local i:Int = b.Map[xx,yy].height-1 To 0 Step -1
						DrawImage allTiles,0,(i*TILE_HEIGHT),Readint(inFile)
					Next
					GrabImage b.Map[xx,yy].graphic,0,0
				End If
								
				SetColor 255,255,255
			Next
		Next
		
		Return b				
	End Function

	Method Draw()
		SetClsColor 50,50,200
		Cls
		For Local xx:Int = 0 To width-1
			For Local yy:Int = 0 To length-1
				If Map[xx,yy].height>0 Then
					Local screenx=(SCREEN_WIDTH/2)-(TILE_WIDTH/2)+((TILE_WIDTH/2)*xx)-((TILE_WIDTH/2)*yy)+slideX
					Local screeny=(yy*(TILE_TOP/2))+(xx*(TILE_TOP/2))+((height-Map[xx,yy].height)*TILE_HEIGHT)+slideY
					DrawImage Map[xx,yy].graphic,screenx,screeny
					
				EndIf	
			Next
		Next

	End Method 
End Type


Global timer:Int =MilliSecs()+1000
Global ticks:Int=0
Global secs:Int=0
Global a:BattleMap = BattleMap.Create("Testie")
Repeat
	a.Draw()
	DrawText "FPS: "+secs,0,SCREEN_HEIGHT-20
	If timer<=MilliSecs() Then
		timer=MilliSecs()+1000
		secs=ticks
		ticks=0
	Else
		ticks=ticks+1
	End If
		FlushMem()
	Flip 
Until KeyHit(KEY_ESCAPE)
	

and this is the pic


and the data file
http://projects.rpgi.net/tact/files/Testie.dat