Have you tried submitting the transaction elsewhere? IIRC nonfinal transactions (which include OP_CLTV transactions) are considered nonstandard so they are not relayed by many nodes. However there may be an exception to that with OP_CLTV.

Edit: I think I found your problem. It isn't the time specified in your transaction yet so you will need to wait until then to spend the funds. It is currently 12/30/2015 @ 3:56am (UTC) but it is locked until 12/30/2015 @ 5:00am (UTC)