Gemini Realtime Model Transcriptions not working

[ArunkumarKv-iN]

I am trying to enable Transcriptions for gemini realtime model but im not receiving any transcriptions.
below is how im creating my model
model = google.realtime.RealtimeModel(
instructions=(
"You are a conversational AI designed to function as a voice assistant. "
),
modalities=cast(list[Modality], config.modalities),
voice=config.voice,
temperature=config.temperature,
max_output_tokens=int(config.max_response_output_tokens),
api_key=os.getenv("GEMINI_API_KEY"),
enable_agent_audio_transcription=True,
enable_user_audio_transcription=True,
)

I have also tried using transcriptionsOptions
transcription_options = AgentTranscriptionOptions(user_transcription=True, agent_transcription=True)
agent = MultimodalAgent(model=model, chat_ctx=chat_ctx, fnc_ctx=fnc_ctx, transcription=transcription_options)

Still didnt receive any transcriptions in events.

Please help on this issue.