Component Description is not appear in part file

Hello all,

I want to use "Component Description" in part file to separate the file name (it's only numbers) from the description.

I write in Configuration Properties in Property Name "Description" and set some value/text. 

After i rebuild this text is not appear in Component Description. I try the same in the tab "Custom" but the result is the same.

Can you help me with this issue? Thanks in advance.