Novak GTB Soldering issue!

[Jachto]

Hello!

Yesterday i was trying to change my wires from the motor to the ESC.(Novak GTB) I got the wires away from the motor, but when i was trying to warm up the soldering on the ESC it didn't work! I got a brand new (soldering iron) yesterday too. It's a soldering iron wich you can rise or lower the temperature, and i tried at 450'C and it wouldn't work! It's the original stock soldering on the esc...

Anyone got any idea?

Pretty angry about this.

Thanks!
//Jakob