book of vaadin - install addon example

Hi,

i am new in vaadin. I read some lines from book of vaadin and i got stucked on 13.5.1 Installing addons to Roo. I cant get that example working. It s everything ok with installing new addon, but when i tried to create a and compiling widget set i got an error in roo console.

[INFO]
Scanning for projects…
[INFO]
Searching repository for plugin with prefix: ‘vaadin’.
[INFO]

[ERROR]
BUILD ERROR
[INFO]

[INFO]
The plugin ‘org.apache.maven.plugins:maven-vaadin-plugin’ does not exist or no valid version could be found
[INFO]

[INFO]
For more information, run Maven with the -e switch
[INFO]

[INFO]
Total time: 1 second
[INFO]
Finished at: Fri Oct 07 14:42:53 CEST 2011
[INFO]
Final Memory: 12M/107M
[INFO]

Can somebody tell me why?

Check your pom. I think the artifactId should be vaadin-maven-plugin and not maven-vaadin-plugin.

Hope it helps.

Frank.