StarTeam supports compatibility between clients and servers which are either one release ahead or behind one another. This support is provided for your convenience in implementing your upgrades to the latest release. Some functionality may only be available in the latest release. You will achieve best performance by upgrading your clients and servers to the same release.
While some flexibility in client-server release combinations is allowed, the StarTeam Server 14.0 will not support connections from clients using an SDK older than the StarTeam 2009 R2 SDK.