after upgrading to 1.0 (Artifact Resolver plugin), the build is failing:

[EnvInject] - Loading node environment variables.
Building on master in workspace /appli/jenkins/jobs/COMMON-JAVA-ServletImpression_deploy_forms_app_dev_03-DEV/workspace
[workspace] $ /bin/sh -xe /tmp/hudson8255542072747478763.sh
+ rm -f 'target/*'
+ grep SERVLET
+ env
SERVLET_VERSION=1.4-SNAPSHOT
SERVLET_ARTIFACT_URL=http://nexus.xxxx/nexus/content/groups/public/com/stef/soa/contratheque-soa/1.4-SNAPSHOT/contratheque-soa-1.4-SNAPSHOT.war
SERVLET_ARTIFACT_ID=contratheque-soa
SERVLET_GROUP_ID=com.stef.soa
SERVLET_PACKAGING=war
INFO: define repo: [Repository id=nexus-xxx, type=default, url=http://nexus.xxxx/nexus/content/groups/public/, isRepositoryManager=true]
INFO: set authentication for jenkins
failed to expand tokens for [Artifact ${SERVLET_GROUP_ID}:${SERVLET_ARTIFACT_ID}:${SERVLET_PACKAGING}::${SERVLET_VERSION}]
java.lang.ClassCastException: eu.markov.jenkins.plugin.mvnmeta.MavenMetadataParameterValue cannot be cast to org.jvnet.hudson.plugins.repositoryconnector.VersionParameterValue
at org.jvnet.hudson.plugins.repositoryconnector.ArtifactResolver.checkVersionOverride(ArtifactResolver.java:183)
at org.jvnet.hudson.plugins.repositoryconnector.ArtifactResolver.download(ArtifactResolver.java:127)
at org.jvnet.hudson.plugins.repositoryconnector.ArtifactResolver.perform(ArtifactResolver.java:101)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:772)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:535)
at hudson.model.Run.execute(Run.java:1732)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:234)
Build step 'Artifact Resolver' marked build as failure
Archiving artifacts
Finished: FAILURE