Author variable in pdm data card

Hello there,

I have a trouble linking the author variable in our PDM PRO to our custom properties. 

We wish to get automatically the name of the designer in both the pdm data card and the custom property tab. 

We are able to choose the name of the designer from a list but we would like to have it automatically inserted by default and in case it is needed to alter it. 

We have set the variable in the pdm this 

We have created the partcustom property tab like this 

The result we get in the data card is this : 

Any help is highly appreciated.

Thank you in advance

SolidworksData Management