Error while using Tableexport addon.

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hi,
I am very new to Vaadin and just created a simple vaadin application using maven. Now I need to use the Tableexport addon and I have done the changes as per vaadin site as below. After this changes my POM.xml is giving me the error
Missing artifact org.vaadin.addons:tableexport:jar:1.3.0:compile
. Could you please let me know what else changes I need to do apart from this.

.... org.vaadin.addons tableexport 1.3.0 .... vaadin-addons http://maven.vaadin.com/vaadin-addons

Thank You in advance.