Done, but no succes. A 148 SXC transaction commanded 2.2 SXC fees, wallet to wallet. Maybe all the miners in the network have set their high arbitrary transaction fees.
My guess would be that your balance is made up of a large number of very small payments, probably pool payouts. If you combine many small payments into one big, this will produce a large transaction (kilobyte-wise). Large transactions require fees, no matter what you set paytxfee to, AFAIK.