Hi ..
I suggest.
1.- Backup your config to a ftp server
sensor# copy current-config ftp://qa_user@10.89.146.1//tftpboot/update/qmaster89.cfg
Password: ********
2.- Use the IPM and from the configuration tab make sure you list ALL signatures. Then click on select all tab and click on disable.
3.- Apply the changes and then perform the test
4.- After the test restore the configuration by using
sensor# copy ftp://qa_user@10.89.146.1//tftpboot/update/qmaster89.cfg current-config
Password: ********
Warning: Copying over the current configuration may leave the box in an unstable state.
Would you like to copy current-config to backup-config before proceeding? [yes]:
I hope it helps ..please rate it if it does !!!