Thanks anyway man

Sadly I don't find any help online, the Repo's don't include info either. :/
So if anyone has more ideas, I'd be glad.

This is what I have
// Sign the transaction with keyPair of Sender
for (var i in transHashesNeeded){
tx.sign(parseInt(i), keyPair);
}
var transactionHex = tx.build().toHex()
// Request current BTC Price for $ &
var decodedHex;
$.ajax({
url: "http://btc.blockr.io/api/v1/tx/decode",
type: "post",
data: {
hex: transactionHex
},
success: function(response) {
decodedHex = response;
document.getElementById('baseDiv').innerHTML += "
Decoded Hex: " + JSON.stringify(response);
$.ajax({
url: "http://btc.blockr.io/api/v1/tx/push",
type: "post",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: JSON.stringify({
hex: transactionHex
}),
success: function(response) {
console.log("Transaction pushed. " + response);
},
error: function(xhr) {
console.log(this);
console.log("Failed to Push: " + xhr.responseText);
console.log("Transaction Hash: " + transactionHex);
console.log("This is pushed: " + this.data);
}
});
},
error: function(xhr) {
console.log("Failed to decode Hex. -> " + xhr);
}
});
}
});
And this is the console output
Objectaccepts: Objectasync: truecontentType: "application/json; charset=utf-8"contents: Objectconverters: ObjectcrossDomain: truedata: "{"hex":"0100000001329e495a5e7dbb619ca84b3f1bc9ee0cca279f538b7ea0513a33be5ed46fe370000000006a473044022075b6372ed5febf7724613eddf7207fb5ed7b60b8c3f8d2cb77e76248c1f2daf102206edef165631bdf8455a5b486c0f7189ed80719c5ec726dccdecf3564fd59ae7901210250a251bd8365ee73a91fe09cb3477b400841c158a59874a8b041e7dff48412e5ffffffff0280969800000000001976a9142ca0f264fcffd0ceb34b109e1403a11ecacd73b288ac17db6d07000000001976a914251fafe412cdd9d4f32aabb8ea8858a97203016588ac00000000"}"dataType: "json"dataTypes: Array[2]error: (xhr)flatOptions: Objectglobal: truehasContent: trueisLocal: falsejsonp: "callback"jsonpCallback: ()processData: trueresponseFields: Objectsuccess: (response)type: "POST"url: "http://btc.blockr.io/api/v1/tx/push"xhr: ()__proto__: Object
(index):170 Failed to Push: {"status":"fail","data":"Could not push your transaction!","code":500,"message":"Did you sign your transaction?"}
(index):171 Transaction Hash: 0100000001329e495a5e7dbb619ca84b3f1bc9ee0cca279f538b7ea0513a33be5ed46fe370000000006a473044022075b6372ed5febf7724613eddf7207fb5ed7b60b8c3f8d2cb77e76248c1f2daf102206edef165631bdf8455a5b486c0f7189ed80719c5ec726dccdecf3564fd59ae7901210250a251bd8365ee73a91fe09cb3477b400841c158a59874a8b041e7dff48412e5ffffffff0280969800000000001976a9142ca0f264fcffd0ceb34b109e1403a11ecacd73b288ac17db6d07000000001976a914251fafe412cdd9d4f32aabb8ea8858a97203016588ac00000000
(index):172 This is pushed: {"hex":"0100000001329e495a5e7dbb619ca84b3f1bc9ee0cca279f538b7ea0513a33be5ed46fe370000000006a473044022075b6372ed5febf7724613eddf7207fb5ed7b60b8c3f8d2cb77e76248c1f2daf102206edef165631bdf8455a5b486c0f7189ed80719c5ec726dccdecf3564fd59ae7901210250a251bd8365ee73a91fe09cb3477b400841c158a59874a8b041e7dff48412e5ffffffff0280969800000000001976a9142ca0f264fcffd0ceb34b109e1403a11ecacd73b288ac17db6d07000000001976a914251fafe412cdd9d4f32aabb8ea8858a97203016588ac00000000"}
If you simply take the transactionHex and push it manually everything works perfectly fine.