cannot find com.wiref..._2.1.0.jar

I have tryed to install wireframeSketcher on Eclipse Helios Service Release 1 and SpringSource Tool Suite 2.5.0.RELEASE both running on Windows 7, but i end up getting this error

An error occurred while collecting items to be installed session context was:(profile=com.springsource.sts.ide, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: osgi.bundle,com.wireframesketcher.model,2.1.0.
http://wireframesketcher.com/updates/plugins/com.wireframesketcher.model_2.1.0.jar
Artifact not found: osgi.bundle,com.wireframesketcher.spy,2.1.0.
http://wireframesketcher.com/updates/plugins/com.wireframesketcher.spy_2.1.0.jar
Artifact not found: osgi.bundle,com.wireframesketcher.ui,2.1.0.
http://wireframesketcher.com/updates/plugins/com.wireframesketcher.ui_2.1.0.jar

I can see on http://wireframesketcher.com/updates/plugins/ that there no package with the name com.wiref...2.1.0.jar but with the name com.wiref...2.1.jar

Hi Frank,

This was a problem with the update site. Thanks for letting me know. I fixed it so please try again.

Tanks that did the trick.