Views and Pathauto Alias Contextual Filter

Hey Guys, I have created a view with a contextual filter get value from url, i am using pathauto and cant seem to get it to pick the category from the url because the view is using the system url. how do i get the filter to use the alias url? e.g
node/810 <== it picks node
instead of
/business/cash-flow <== business

want it to use alias business not systems url node