License addon with addon example

[NetPlanetGR]

Hello

I have the license addon and i am making some tests.

I have created a product that has the Module Name "License Software". The example test works just fine.  I have some troubles by creating an addon for a product.

Lets assume that i have a product that has the Module name the "cPanel" (just a hosting product).

I want to create an addon that will be an extension for the hosting that will have a license check to their website. 

I went to Setup / Products /Product Addons and created the addon. 
Module settings:

Product Type: other
Module Name: License Software
entered the secret key etc.
Tab Applicable Products selected the hosting product that i created earlier.  

 

When i try the example the license is valid till the  code that checks the md5 checksum and i get the following error message "MD5 Checksum Verification Failed"

Any suggestions?