How to show logo on mystile theme in header

Hello,

Im using mystile thme from Wootheme and i uploaded my custom logo but this one does not appear! I already had a look on the forum and internet and i can’t get a solutions. Some people had this problem but they doesn’t gave the solutions.

Could you help me to show my custom logo on the left of the website tittle on the header.

my website url: http://whosindesign.olympe.in/whosindesign/

Thks for your help!