if i use "mount -t nfs -o vers=3" it works, but using "mount -t nfs -o vers=4" do not working

ganesha.conf
EXPORT
{
Export_Id = 77;
Path = /mnt/DADOS/teste;
Pseudo = /mnt/DADOS/teste;
Access_Type = RW;

FSAL {
	Name = VFS;
}

}