Yeah thanks, too tired last night to check obvious. I needed to use a fresh non-qt wallet to sync with the network, the old wallet on an old drive never seemed to make it, continually resetting to near zero blocks etc. So i copied over the old wallet.dat. Totally forgot it was encrypted! If anyone else needs to use the command :
./yacoind walletpassphrase "your pass phrase" 180
./yacoind sendtoaddress

The double quotes were necessary The command unlocks the wallet for 180 seconds in this example.