Symantec Embedded Database in Services.msc Disappear

Hello,

I have serious issue , When I try to backup database manually suddenly appear notification "could not connect to the database. cannot back up the site." . 

 

my friend said that yesterday he tried to changing the target path for backup file using this way http://www.symantec.com/docs/TECH103675 and when loading process is running deliberately he stop this process using task manager because there is important purpose other . Next, I try to Re-changing the target path as before but appear this notif :

 

Symantec Embedded Database in Services also suddenly disappeared and SEPM status always stopped .

Please give me best solution , because SEP my client (1800+ pc)  cannot update definition ..
I Using SEP 11.x

Thanks and Best Regards,
Fikri