Question: Troubleshooting with maple 13.02

Hello 

Here are the commands, I can't understand why this error comes out

http://i1.ambrybox.com/070710/1278460271555.JPG

It comes out when I want to do this: display(Lines,A)

P:=<1,2,3>

P1:=<-1,-1,0>

P2:=<-1,-1,0>

P3:=<0,-1,-1>

Plane:=x+2*y+3*z

L1:=P+t*(P1-P)

L2:=P+t*(P2-P)

L3:=P+t*(P3-P)

Lines:=spacecurve([L1,L2,L3],t=-2..2)

A:=implicitplot3d(Plane=0,x=-2..2,y=-2..2,z=-2..2)

display(A,Lines) ==============>>>>error shutdown maple

 

Please help me it is urgent for my lecture...

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