ESPRIT 2010
Operation: Solid Mill Traditional - Contouring

I'm having problem with the clearance.
Full Clearance= 30
Clearance= 2
Return Plane= Clearance
Retract Plane= Full Clearance

Under this conditions, tool makes rapid move to absolute (machine origin's) Z30. instead of moving to the chain's workplane's Z30. (which is a different coordinate system) so tool plunges into the stock solid. I guess i changed some setting but do not know what is it. I hope i made it clear. Thanks for your help in advance.