If you have the backup file as well as the password to unlock you should be able to send. How many BTS does the account have? Is it more than 30 BTS? Maybe the fee is bigger than the amount you have on the wallet?
edit: i see you have enough to pay the fees
http://cryptofresh.com/u/bts-er1@xeroc may be able to help
Could you try and post a printscreen here? I don't know of that happening to anyone up until now. Maybe someone will see it and remember if it happened to them.
@fav anyone else had this problem?
NOTE: let me remind you even though you want to "delete" this account (although that's not possible), I would advise you not to do it as it seems you've already paid 20k BTS to be a lifetime member? Ditching this account would mean you've paid 20k BTS for nothing.
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As for the admin unlocking / deleting account part... I don't think you've grasped the concept of what a blockchain is yet. As an advice, you should read more on that so you know where you're using your money and make a more informed decision.