Visualisations compilation problem

Hi everyone,
I’ve tried to use VisualisationsForVaadin add-on. I downloaded vaadinvisualisations2.1.jar file and then two files from (gwt-visualization.jar and gwt-visualization-noredist.jar). Eclipse asked me abou recompilation, so I did it. During that process I have a lot of warnings:

 Errors in 'jar:file:/D:/piotr.rosiak/spring%20tools%20workspace/DQApplicationv3/WebContent/WEB-INF/lib/VaadinVisualizations2.1.jar!/org/vaadin/vaadinvisualizations/widgetset/client/ui/'
 Line 9: The import cannot be resolved
 Line 10: The import cannot be resolved
 Line 29: ImageAreaChart cannot be resolved to a type


and then

 Widget class org.vaadin.vaadinvisualizations.widgetset.client.ui.VAreaChartImage was not found. The component org.vaadin.vaadinvisualizations.AreaChartImage will not be included in the widgetset.

I could use for example ColumnChart, but when application starts I see:

Widgetset does not contain implementation for org.vaadin.vaadinvisualizations.ColumnChart. Check its @ClientWidget mapping, widgetsets GWT module description file and re-compile your widgetset. In case you have downloaded a vaadin add-on package, you might want to refer to add-on instructions. Unrendered UIDL:

	org.vaadin.vaadinvisualizations.ColumnChart(NO CLIENT IMPLEMENTATION FOUND)

What’s wrong?