WHMCS and Paypal

i have setuped in paypal when a user placed an order in local currency

“No, accept them and convert them to U.S. Dollars”.

in whmcs we use the currency LKR

when an order is placed. i am getting below error :

"This recipient does not accept payments denominated in LKR. Please contact the seller and ask him to update his payment receiving preferences to accept this currency.