Hi FelipeFrom your error, it looks like you are either missing some JARs, or have mixed/incompatible versions of JARs on your classpath. Could you check your classpath and let us know which JARs are on it?
Also, I think you should be able to get away without the .credentials(...) part when creating the filesystem context (see e.g. [1]) ;-)
Regards ap[1] https://github.com/jclouds/jclouds/blob/master/apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java#L94
