Can anyone shed any light on this error? Bitcore Multisig - bad-txns-in-belowout Code:

var utxo = new bitcore.Transaction.UnspentOutput({
  "txid" : "e0c6b736e86e8dccd63bbc27f35142b413bd991a410ef50f14cd56fa1a783a1e",
  "vout" : 0,
  "address" : "2NCAeo5p1Pg8VVupFFumCd3PYz551VAZWLJ",
  "scriptPubKey" : "OP_HASH160 20 0xcf8d0490cba6d7ca817323cf0c337fbd0a3de539 OP_EQUAL",
  "amount" : 10000000
});

var multiSigTx = new bitcore.Transaction()
    .from(utxo, pubKeys, 2)
    .to("mwFLeaw5LMAPvoz1hP6qQhHbHkHq8WxM2t", 90000)
    .fee(9000)
    .change("mwFLeaw5LMAPvoz1hP6qQhHbHkHq8WxM2t")
    .sign(privKeys);


var txSerialized = multiSigTx.serialize(true);
insight.broadcast(txSerialized, function(err, returnedTxId) {
  if (err) {
    console.log(err);
  } else {
    console.log("Sent coins, tx id is: ");
    console.log(returnedTxId);
  }
});


Result:

Transaction rejected by network (code -26). Reason: 16: bad-txns-in-belowout
That error happens when the transaction attempts to send more Satoshis than it spends. You might have your units mixed up (using Satoshis instead of BTC, or vice versa). 

The code that throws the error can be sheen here: https://github.com/bitcoin/bitcoin/blob/v0.10.2/src/main.cpp#L1462-L1465