order by desc, or asc

I made a page named “all stores” with the following shortcode ;

[STORES perrow=4 icon=yes orderby=’store_title’ order=’desc’].
It shows the merchant name with Reverse alphabetical order.

I want this page to show merchant name alphabetically.

I tried several options ;
orderby=’store_title’ order=’desc’
orderby=’store_title’ order=’asc’
orderby=’store’ order=’desc’
orderby=’store’ order=’asc’

but it does not work.

How can I arrange it alphabetically?