Problem with relative paths

I have a web application that loads images from the server. 

A folder structure is the following:

C:\inetpub\wwwroot\SQLServer\Root. The app is running from Root. Images are stored in:

C:\inetpub\wwwroot\SQLServer\Root\assets

and relative path is:

../assets/image_file_name.png

It works locally although a local file structure is different.

Please help.

Thanks