JSF(managed) bean can not remove record

[Jason Marlyn]

hi folks
following code should remove a record from DB, but it doesn't

public void delIt(ActionEvent act){EntityManager EM=EMF.createEntityManager();
        try{
            boolean grant=FacesContext.getCurrentInstance().getApplication().createValueBinding("#{user.access}").getValue(FacesContext.getCurrentInstance()).equals(true);
            if(!grant){FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Access is denied"));return;}
            _PBeans.books tm=EM.find(_PBeans.books.class, this.value);
            if(tm!=null){EM.getTransaction().begin();
                EM.remove(tm);
            EM.getTransaction().commit();this.thisBook=new _PBeans.books();
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("book removed successfully "+tm.getName()+tm.getId()+"\\"));return;} //[0]
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Error"));
        }catch(Exception e){throw new FacesException("an error occured details: "+e);}finally{EM.close();}
    }

System can not compile the line [0], no exception, no error, no message, no change in the DB
provider: OpenJPA