Idea Net Setter Huawei E1732 comes with customized dashboard and firmware. Hence, you can not unlock it through normal procedure to as you were doing to unlock other huawei modem.
How to unlock Huawei E1732 Idea Customised modem firmware free :
15. When the process will reach at 100% you can see success message then click on OK and From Main Tab Disconnect your modem and you are Done.
Now enjoy your unlocked E1732 Idea Huawei modem all over the world with any another network provider sim.