Kindly follow the below mentioned steps:

1) Login to your HELM control panel.
2) Click on Domains icon.
3) Select your domain name
4) Click on Virtual Directories icon.
5) Click on Add New button.
6) Path To Virtual Directory: Provide the root folder (\) sign.
7) Virtual Directory Name: enter your virtual name
8) Path To Physical Folder: browse to find the folder.
9) Redirect To URL: Leave Blank.
10) Click on Save button.