BTable problems!!!

I'm really excited for this new plugin but I have an error trying to make it work in Bi-server 5.0.1 CE.

FIRST:
In the PUC, when I click on the tab "Tools" --> "BTable" this appears:
"Could not load dashboard: Unknown plugin"

SECOND:
In the PUC, when I click on the button "Create New" --> "BTable Analyzer" when I select my Catalog this red warning appears:
"A BTable datasource for the selected catalog does not exists!"
(even if the "Cube", "Measure", "Dimension" are correctly configured)

Are the First and the Second error related to each other? Do you have any idea?

Thank you all