How to exclude folders from System State backup?

Hi,

I am trying to configure server backup in 2008 R2 server. I need to exclude certain folder from System State backup. In the backup wizard, under select items for backup, I am selecting System State backup and in Advanced settings\add exclusions I am excluding a folder in C drive. This gets added there and I am able to schedule it. But when I edit the schedule again, this exclusion is disappeared. Please help me on this. We need to exclude this folder as this is related to some security software.

Is there any other way to exclude this folder?

Thanks,
Sarat U