I solved my issue with JasperServer 3.0. It was not compatible with the NB plugin 3.1.1 To solve this issue I replaced my \Program Filesjasperserver-3.0apache-tomcatwebappsjasperserverWEB-INFlibjasperreports-3.0.0.jar with jasperreports-3.1.0.jar, which I obtained from my NB setup \Program FilesJasperSoftiReport-nb-3.1.1ireportmodulesext