In the near future, the IRIS DMC will be updating its FDSN web services to the 1.1 specification. Unfortunately this will cause all versions of IRIS-WS prior to 2.0.4 to fail due to a built-in version check. We have modified the check to avoid this kind of breakage in the future.
For reference, the version check can fail with either of these messages:
edu.iris.dmc.service.ServiceNotSupportedException: Version is not supported.
The IRIS-WS java library version doesn't support the requested station service version