Service tax on export of services

Dear Tax Gurus,

I have started a private limited company in india last year which is dealing with a CA firm of UK .

My company in India provides Accounting services to the UK Based Firm . Money was sent to us directly in Pounds which gets converted in INDIA Only. Now please tell do i have to pay service tax or is it free for our services ?

Please reply as i have been wandering here and there with so many different opinions .

Thanks