SBIRs have been mucked up since last fall. The program lapsed and it just got reauthorized for certain departments. Without that reauth only those who had phase 1's could apply for phase 2's.
It depends - some agencies you can apply directly without doing a phase 1. Others you need talk to the TPOC of the Phase 1 to find out the process or you have to be invited.
In the current environment - I would contact the TPOC - it could just be stuck in limbo.