input credit

Vivek Chandra Garg (13 Points)

10 May 2007  
dear friends
one of the my client is a service provider. he has imported two machines, one in the year 2005-2006 and second in 2006-2007. duty has been paid about rs.10 lacs. in the year 2006-2007, he has deposited rs. 15 lacs as service tax with out taking input credit. can we claim for refund on the same? under which rule?
pl reply soon so that we can claim for redund/ adjusment/credit in the return to be filed before 25.04.07.