import from l3dt

having trouble importing from l3dt for torque to torque 3d get this message every time i try to move a terrain from l3dt to torque 3d

L3DTio_TorqueTER::ExtExportTer7UI error:
- Cannot open mission file 'C:TorqueTorque 3D 1.2My Projectsfuckgamelevelslevelsdisam.mis' for writing