Installer Backup File Selection (New to SB)

I would like to include all tps files in the backup. Installed files backup fine. I cannot seem to get the tps files to copy. Below is my script source. What might I be doing wrong? Thanks

Set Variable %_SB_INSTALLDIR% to "[INSTALLDIR]"
Set Variable %_SB_PROGRAMGROUP% to "[PRODUCTNAME]"

! %_SB_BACKUPDIR% holds the path that all backup files will be copied to when overwritten
Set Variable %_SB_BACKUPDIR% to "%_SB_INSTALLDIR%\BACKUP"
Create Unique Backup File from "%_SB_INSTALLDIR%\*.tps" to "%_SB_INSTALLDIR%\BACKUP" [Permanent]