Entities going through others?

[AlbertoBC]

Heeello there.

So I've been lately working again on a gamemode, and I've found a problem.

The thing is, that I've made a script that replaces all props with certains models with another entity (that can drop stuff and be destroyed) that gets the same model (there are two entities almost identical: rocks and trees).

The problem is that when a resource is spawned, it goes through trees and when a tree is moved, there's like an invisible something colliding.

Both rocks and trees have the same things on ENT:Initialize regarding physics

Tree:

        function ENT:Initialize()
		-- Physics initialize.
		self:PhysicsInit(SOLID_VPHYSICS)
		self:SetMoveType(MOVETYPE_NONE)
		self:SetSolid(SOLID_VPHYSICS)
		
	end

Rocks:

        function ENT:Initialize()
		-- Physics initialize.
		self:PhysicsInit(SOLID_VPHYSICS)
		self:SetMoveType(MOVETYPE_NONE)
		self:SetSolid(SOLID_VPHYSICS)

		self:SetRenderMode( RENDERMODE_TRANSALPHA )
		self:SetColor(Color(255,255,255,255))
		
		self.Enabled = true -- This is for a respawning function
		
	end

This is the function that spawns them: [B](TreeModels and RockModels are two tables fully working)[/B]

        function SURVIVAL:InitializeResourceSources()
	
		local classes = {"prop_physics", "prop_physics_override", "prop_physics_multiplayer", "prop_dynamic", "prop_static"}
	
		for k,ent in pairs(ents.GetAll()) do
		
			if table.HasValue(classes, ent:GetClass()) then
			
				if table.HasValue(TreeModels, ent:GetModel()) then
			
					local src = ents.Create("tree")
					src:SetPos(ent:GetPos())
					src:SetAngles(ent:GetAngles())
					
					src:SetModel(ent:GetModel())
					src.ENTHealth 		= math.random(200,400)
					
					src:Spawn()
					
					ent:Remove()
					
				elseif table.HasValue(RockModels, ent:GetClass()) then
				
					local src = ents.Create("rock")
					src:SetPos(ent:GetPos())
					src:SetAngles(ent:GetAngles())
					
					src:SetModel(ent:GetModel())
					src.ENTHealth 		= math.random(250,500)
					
					src:Spawn()
					
					ent:Remove()
				
				end
			
			end
		
		end
	
	end

Here's a video to see what's going on [B][EXTREME LOW QUALITY, I WANTED TO UPLOAD IT FAST][/B]
[video=youtube;8YII4Tt7tcM]https://www.youtube.com/watch?v=8YII4Tt7tcM&feature=youtu.be[/video]