Maintenance to my paypal integration.

I need someone to set the currency conversion for paypal on my website. I.e the currency on my website is KYD (cayman islands dollars), I need it converted to USD (united states dollars) once the payment is redirected to paypal website. I.e When my users click the paypal button to pay for my service the currency should be converted @1.25 but it is not converting on the paypal website and paypal is showing the kyd amount in usd which is a lose for me.

Exp: $1.00 kyd is $1.25 usd

Please contact me to discuss further.