I just fix the issue. Selenesse.jar is required in fitnesse in order
to launch web test.
But, in maven repository there is no selenesse. So i had to find a way
to add a dependency to my pom.xml file.
So i launched this command :
mvn install:install-file -Dfile=C:\fitnesse\dist\java\selenesse.jar -
DgroupId=org.seleniumhq.selenium.selenesse -DartifactId=selenesse -
Dversion=1.0 -DgeneratePom=true -Dpackaging=jar
Then i've just to add the dependency in my pom.xml. And.... It
worked ! :)