problem with the plugin

hi,

I have just purchased the plugin.
I am facing problem which when I login to my site as admin – the currency of the site set to the default one ($) – as I setup it to be S.R on location of Saudi Arabia. even when I logged out – the currency still on Default one.
I checked from another devices and I got the currency as I like S.R as we are in saudi Arabia.
So, where is the problem Exactly? please advice of some one help me.