Fuseki 1.0.1 SPARQL update returns 404

Question

Fuseki 1.0.1 SPARQL update returns 404

I am trying to learn how to update data in Fuseki, but when I try to get 404 error. I obviously am not doing anything right. Perhaps this is my INSERT command? I tried a ton of them, though.

I am using the SPARQL web interface on /sparql.tpl.

I can get SPARQL Queries to work on the same page just fine. But the second form, designated SPARQL Updates, is what I use for my update, and it gives me errors:

PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX booklet:  <http://www.semanticweb.org/cstepnitz/ontologies/booklet>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX ontology: <http://dbpedia.org/ontology/>

INSERT DATA
{ <http://dbpedia.org/resource/Johnny_Got_His_Gun> 
        rdf:type ontology:Book

}

This is the error I get when form messages are sent to localhost: 3030 / bookfinder / update:

Error 404: Not Found
Fuseki - version 1.0.1 (Build date: 2014-01-18T19:01:20+0000)

This is my TTL file.

@prefix :               <http://www.semanticweb.org/cstepnitz/ontologies/bookreader#> .
@prefix bibo:           <http://purl.org/ontology/bibo/> .
@prefix booklet:        <http://www.semanticweb.org/cstepnitz/ontologies/booklet> .
@prefix dbp:            <http://dbpedia.org/ontology/> .
@prefix dbpedia:        <http://dbpedia.org/ontology/> .
@prefix dbpedia-owl:    <http://dbpedia.org/ontology/> .
@prefix NS5:            <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl:            <http://www.w3.org/2002/07/owl#> .
@prefix rdfs:           <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdms:           <http://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems> .
@prefix owlapi:         <http://www.semanticweb.org/owlapi#> .
@prefix schema:         <http://schema.org/> .
@base <http://www.semanticweb.org/cstepnitz/ontologies/bookreader> .


<http://www.semanticweb.org/cstepnitz/ontologies/bookreader> NS5:type owl:Ontology ;
     owl:imports dbp: .
booklet:readbook NS5:type owl:ObjectProperty ;                    
     rdfs:range dbpedia-owl:Book ;                    
     rdfs:domain booklet:Reading ;                    
     rdfs:subPropertyOf owl:topObjectProperty .

booklet:reading NS5:type owl:ObjectProperty ;                   
     rdfs:domain booklet:Bookreader ;           
     rdfs:range booklet:Reading .

:OWLObjectProperty_18e83c77_09cb_4d9b_90c6_93b2a5095d78 NS5:type owl:ObjectProperty ;
     rdfs:label "recommendedBooks"@en ;
     rdfs:range dbpedia-owl:Book ;
     rdfs:domain booklet:Bookreader .

:OWLObjectProperty_86497b97_bef7_4b9e_80bc_6080ce0cbfe3 NS5:type owl:ObjectProperty ;
     rdfs:label "bookrating"@en ;
     rdfs:range booklet:Bookrating ;
     rdfs:domain booklet:Reading ;
     rdfs:subPropertyOf owl:topObjectProperty .

dbpedia-owl:Book NS5:type owl:Class .
schema:Person NS5:type owl:Class .
booklet:Bookrating NS5:type owl:Class .
booklet:Bookreader NS5:type owl:Class ;
rdfs:subClassOf schema:Person .
booklet:Reading NS5:type owl:Class .

:OWLClass_38c67bca_82ba_44b7_85dd_31d0c2883702 NS5:type owl:Class ;
     rdfs:label "Poor"@en ;
     rdfs:subClassOf booklet:Bookrating .

:OWLClass_5630d470_6dda_4cd5_9596_ddf0eab29cde NS5:type owl:Class ;
     rdfs:label "Best"@en ;
     rdfs:subClassOf booklet:Bookrating .

:OWLClass_694d8a9e_5fba_45a2_81b3_f47f1a21af4d NS5:type owl:Class ;
     rdfs:label "Average"@en ;
     rdfs:subClassOf booklet:Bookrating .

:OWLClass_dfb73eb5_8a7c_4628_a423_72056e7ee81f NS5:type owl:Class ;
     rdfs:label "Good"@en ;
     rdfs:subClassOf booklet:Bookrating .

:OWLClass_f3923184_fbb7_48ec_954e_49e233454099 NS5:type owl:Class ;
     rdfs:label "Awful"@en ;
     rdfs:subClassOf booklet:Bookrating .