Problem on SMB sharing to iPad

Dears

Since I’ve got an “incomplete DLNA index” problem, so I tried to access the shared content via SMB. I’ve activated SMB2 in My Cloud EX2. The player I use in iPad is PlayerXtreme, I can see that the SMB sharing is detected by the player, however, after given the log in name, it shows failed on connecting message. The log in account is the administrator account I set for My Cloud EX2 and I’m sure there is no typo of the profile. Then why I got such failure?