fft ip of quartus9.0

hi, I am a newer of FFT ip, today I try to use FFT ip of quartus9.0, but it appears to a problem.

Warning: Can't generate programming files for project because design file "E:/FFT_IP/incremental_db/compiled_partitions/fft_ip.root_partition.map.atm" is encrypted. It does not have license file support that allows generation of programming files.

I want to know how to deal with it!