Hi there, DarkCoin freaks!

I've been trying to initiate a test transaction using DarkCoin Version v0.10.12.31-beta and transferring the amount of 1.37885704 DRK to another Wallet as anonymous transaction.

I always get this: Unable to locate enough Darksend denominated funds for this transaction
Ok, I admit to be no professional at transferrring DarkCoin (yet), but how to resolve this Issue?