BOO: Unexpected Errors

Hey Guys, I've added another class to my project and now I'm getting some weird errors! I don't know the problem, I've only added another class ( BlockPhysics class)

 import UnityEngine
 
 public class BlockTexture(): // function parameters are the position in the texture
     
     public top as Vector2
     public north as Vector2
     public east as Vector2
     public south as Vector2
     public west as Vector2
     public bottom as Vector2
     
     def textureIndexToPosition(i as int):
         y as int = Mathf.Floor(i/Blocks.textureSize)
         x as int = i - y * Blocks.textureSize
         return Vector2(x, y)
         
     def constructor(_top as int, _north as int, _east as int, _south as int, _west as int, _bottom as int):
         top    = textureIndexToPosition(_top)
         north  = textureIndexToPosition(_north)
         east   = textureIndexToPosition(_east)
         south  = textureIndexToPosition(_south)
         west   = textureIndexToPosition(_west)
         bottom = textureIndexToPosition(_bottom)
         
 public class BlockPhysics():
     
     public isSolid as bool
     
     def constructor(_isSolid as bool):
         isSolid = _isSolid
         
 public class BlockType():
     
     public id as int
     public name as string
     public texture as BlockTexture
     public physics as BlockPhysics
     
     def constructor(_id as int, _name as string, _texture as BlockTexture, _physics as BlockPhysics):
         id      = _id
         name    = _name
         texture = _texture
         physics = _physics
 
 public static class Blocks (MonoBehaviour): 
     
     public textureSize as int = 10;
 
     public blockList as List = [
         BlockType(0, "Bedrock",BlockTexture(0, 0, 0, 0, 0, 0), BlockPhysics(true)),
         BlockType(1, "Stone",  BlockTexture(1, 1, 1, 1, 1, 1), BlockPhysics(true)),
         BlockType(2, "Dirt",   BlockTexture(2, 2, 2, 2, 2, 2), BlockPhysics(true)),
         BlockType(3, "Grass",  BlockTexture(4, 3, 3, 3, 3, 2), BlockPhysics(true)),
         BlockType(4, "Wood",   BlockTexture(6, 5, 5, 5, 5, 6), BlockPhysics(true)),
         BlockType(5, "Leaves", BlockTexture(7, 7, 7, 7, 7, 7), BlockPhysics(true)),
         BlockType(6, "Glass",  BlockTexture(8, 8, 8, 8, 8, 8), BlockPhysics(true))
     ]
     
     public def getBlockById(id):
         return blockList[id]    

Errors: Assets/Scripts/Blocks/Blocks.boo(36,23): BCE0018: The name 'BlockTexture' does not denote a valid type ('not found'). Assets/Scripts/Blocks/Blocks.boo(37,23): BCE0018: The name 'BlockPhysics' does not denote a valid type ('not found'). Assets/Scripts/Blocks/Blocks.boo(39,62): BCE0018: The name 'BlockTexture' does not denote a valid type ('not found'). Assets/Scripts/Blocks/Blocks.boo(39,88): BCE0018: The name 'BlockPhysics' does not denote a valid type ('not found'). Assets/Scripts/Level/Chunk.boo(128,9): BCE0039: Internal macro 'BlockType' could not be compiled. Errors were reported.

Thanks in advance!