SPARQL queries not working for loaded N-Quads dataset in Fuseki2

Question

In Fuseki2 I can load n-quads dataset without any problem but the sparql queries not working. A basic simple query given below also not giving any result

SELECT ?subject ?predicate ?object
WHERE {
  ?subject ?predicate ?object
}
LIMIT 25

But for loaded rdf dataset the sprql queries working well. i started the fuseki2 in standalone mode using following command

 java -Xmx10240M -jar fuseki-server.jar --update --loc=Data /dataset1

I have 16 GB memory in my machine so i allocated 10GB for the fuseki. Until now i didn't try java api i just run the fuseki in standalone mode using above command and from the web browser i am doing everything.

Is there any way to run sparql queries on loaded n-quads dataset