publickey PEM and privatekey PEM in soap UI

Recently we migrated all our collections from postman to soap UI and we were able to test some collections and they are working fine but for the collections that required the public and private certs are not working and throwing errors "internal server error" and they are working fine in postman.

In postman we pass the public and private keys as variables and we are doing the same in soap UI , passing them as properties but its throwing error. 

Can you please advise