Slitherine

How does one remove tank traps? I have a Sherman Rhino in Fortified Line 1.4 scenario. I have ordered it to remove tank traps but nothing happens. Hiw many rounds it takes, and should I not touch Rhino during those rounds or give the same order each round?

See https://dl.dropbox.com/u/36194263/Actions.pdf

Four action are needed to remove a tank trap.