Also, when you closed out the recording, did you apply any specific Data Protocol Handlers (or DPHs)?
DevTest relies on these DPHs to parse the incoming requests and generate operations, signatures, etc. to align requests and responses.
As a Best Practice, when you execute a recording, ensure that you save a copy of the Raw Traffic File (1st panel in the Wizard). This raw traffic file can be replayed so you can tune / configure the DPHs according the requirements. The raw traffic file enables the recorder to replay the traffic without re-recording the live flow between the two applications.