QUESTION:
 I'm running the last version firmware v24-sp2 (03/23/14) kongac(SVN revision 23770M). 

 I was having Sharing/Torrent problems with original Asus firmware, so I decided to go with DD-WRT. 

 After all set, the firmware is running great, the only problem is that after a reboot, it looses File Sharing. To solve this, 
 I need to go in Services > NAS tab and just click the button "Apply Settings", without change anything. 

 I have a 500gb HD with NTFS file system mounted to /tmp/mnt/sda5. 

 Could NTFS file system be the problem? 

ANSWER:
add these two lines in Startup: 

Code:

 /sbin/stopservice samba3 
 /sbin/startservice samba3 

 That should have the same effect as pressing save and apply on the nas page.