Script won't rotate bricks? PLEASE READ URGENT

So i'm making a bezier curve script, and I have the rotation set up, and it looks fine, no errors, but the bricks don't rotate! It works for Position, and I don't know why it isn't working for Rotation. Any help? Here is the script:

bc={}
rbc={}
p1={game.Workspace.Start1.Position,game.Workspace.Cont1.Position,game.Workspace.Start2.Position}
p2={game.Workspace.Start2.Position,game.Workspace.Cont2.Position,game.Workspace.EndStart.Position}
r1={game.Workspace.Start1.Rotation,game.Workspace.Cont1.Rotation,game.Workspace.Start2.Rotation}
r2={game.Workspace.Start2.Rotation,game.Workspace.Cont2.Rotation,game.Workspace.EndStart.Rotation}
function CreateLerpsP1()
	for i=1,10 do 
		local t = i/10
		bc[i] = p1[1]*(1-t)^2+2*p1[2]*(1-t)*t+p1[3]*t^2
	end
	for i=1,10 do 
		local t = i/10
		rbc[i] = r1[1]*(1-t)^2+2*r1[2]*(1-t)*t+r1[3]*t^2
	end
	for i=1,10 do
		local t=Instance.new("Part",workspace.CurTrack)
		t.Name="TrackPoint"
		t.BrickColor=BrickColor.Blue()
		t.Anchored=true
		t.CanCollide=false
		t.Size=Vector3.new(4,1,2)
		t.TopSurface=Enum.SurfaceType.Smooth
		t.BottomSurface=Enum.SurfaceType.Smooth
		if i~=1 then
		t.CFrame=CFrame.new(bc[i]:Lerp(bc[i-1],0.5),bc[i])
		t.Rotation=Vector3.new(rbc[i]:Lerp(rbc[i-1],0.5),rbc[i])
		else
		t.CFrame=CFrame.new(bc[i]:Lerp(p1[1],0.5),bc[i])
		t.Rotation=Vector3.new(rbc[i]:Lerp(r1[1],0.5),rbc[i])
		end
	end
end

function CreateLerpsP2()
	for i=1,10 do 
		local t = i/10
		bc[i] = p2[1]*(1-t)^2+2*p2[2]*(1-t)*t+p2[3]*t^2
	end
	for i=1,10 do 
		local t = i/10
		rbc[i] = r2[1]*(1-t)^2+2*r2[2]*(1-t)*t+r2[3]*t^2
	end
	for i=1,10 do
		local t=Instance.new("Part",workspace.CurTrack)
		t.Name="TrackPoint"
		t.BrickColor=BrickColor.Blue()
		t.Anchored=true
		t.CanCollide=false
		t.Size=Vector3.new(4,1,2)
		t.TopSurface=Enum.SurfaceType.Smooth
		t.BottomSurface=Enum.SurfaceType.Smooth
		if i~=1 then
		t.CFrame=CFrame.new(bc[i]:Lerp(bc[i-1],0.5),bc[i])
		t.Rotation=Vector3.new(rbc[i]:Lerp(rbc[i-1],0.5),rbc[i])
		else
		t.CFrame=CFrame.new(bc[i]:Lerp(p2[1],0.5),bc[i])
		t.Rotation=Vector3.new(rbc[i]:Lerp(r2[1],0.5),rbc[i])
		end
	end
end
CreateLerpsP1()
CreateLerpsP2()
game.Workspace.Start1.Changed:connect(function() game.Workspace.CurTrack:ClearAllChildren() CreateLerpsP1() CreateLerpsP2() end)
game.Workspace.Cont1.Changed:connect(function() game.Workspace.CurTrack:ClearAllChildren() CreateLerpsP1() CreateLerpsP2() end)
game.Workspace.Start2.Changed:connect(function() game.Workspace.CurTrack:ClearAllChildren() CreateLerpsP1() CreateLerpsP2() end)
game.Workspace.Cont2.Changed:connect(function() game.Workspace.CurTrack:ClearAllChildren() CreateLerpsP2() CreateLerpsP1() end)
game.Workspace.EndStart.Changed:connect(function() game.Workspace.CurTrack:ClearAllChildren() CreateLerpsP2() CreateLerpsP1() end)

So let's say that the variables cf and rotrepresent the CFrame/rotation you're trying to set.

try doing this:

t.CFrame=CFrame.new(cf.p,rot) --using .p changes the CFrame to a Vector3

EDIT: I mean something like this

if i~=1 then
t.CFrame=CFrame.new(bc[i]:Lerp(bc[i-1],0.5),bc[i],Vector3.new(rbc[i]:Lerp(rbc[i-1],0.5),rbc[i]))
else
t.CFrame=CFrame.new(bc[i]:Lerp(p1[1],0.5),bc[i],Vector3.new(rbc[i]:Lerp(r1[1],0.5),rbc[i]))
end

Basically you're just tacking on the Rotation lines to the end of the CFrame lines.