IDM Serial Number Doesn't work. how to solve this problem?

Internet Download Manageer (IDM) serial number blocking Check

First Go to this URL

or Copy paste adreesbar

https://secure.internetdownloadmanager.com/blocked_serial_info.html?sn=

See this Page

Now Paste your code this adrees bar

Here you will see your device name and registration number.

You'll see why you're having trouble.