Seized pedals in carbon cranks, help!

Hairyside Posts: 50
edited December 2009 in Workshop
Got some new Ultegra pedals from Santa, problem is I can't get the old ones off! The cranks are carbon cannondale Si and I have tried a decent pedal spanner, WD40 and a 2 foot long ratchet attached to the hex hole on the pedal, all to no avail.
Any ideas??
(Yes, I am turning in the right direction before you ask.) :wink: