Slow Crystal reports printing

Hi,

i am printing a 1000 Pages report, the report contains 2 sub reports, the problem is that it is taking almost 20 minutes to start printing, and on more records like around 3000 records printing newer starts,how can i print this report, so the printing can start quickly, is there any solution or workaround for it,please note that if i remove sub reports from the report it works fine, but i cannot remove sub reports due to my design limitations.

thanks in advance