Hi, i had the same problems and i fixed like this.

this is my sftab file

Code:
//23.11.74.90/Media 	/mnt/media 	smbfs iocharset=utf8,username=MyUsername,password=MyPassword,uid=1000,gid=1000,dir_mode=0777,file_mode=0777 0 0
//23.11.74.90/Document	/mnt/document 	smbfs iocharset=utf8,username=MyUsername,password=MyPassword,uid=1000,gid=1000,dir_mode=0777,file_mode=0777 0 0
//23.11.74.90/Files	/mnt/files	smbfs iocharset=utf8,username=MyUsername,password=MyPassword,uid=1000,gid=1000,dir_mode=0777,file_mode=0777 0 0
I hope this help you