Turkish Airlines Miles&Smiles - First Class on TurkishAirlines.com ?

Last week I tried several times in order to get first class price for London - Istanbul first class, but I never saw first class available.
Is the first class of Turkish Airlines really so fully booked or is there something wrong with online booking system? (or may be something wrong with me:))

Wirelessly posted (goingaway's phone: BlackBerry8900/4.6.1.231 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)

they might only offer biz and coach on the route which very likely the case

Think this was discussed before, you currently cannot book First Class on the thy.com website, try using expedia or the like to search for F seats (only the leased Boeing 777-300ER have F seats)