[Resolved]  Council Of Architecture, India Habitat Centre, Lodhi Road, New Delhi — didn,t received acknowledgment

i send a registerd post with acknowledgement(for renewal of my certificate of registration to ,

THE REGISTRAR,
COUNCIL OF ARCHITECTURE,
INDIA HABITAT CENTRE,
CORE 6A, FIRST FLOOR,
LODHI ROAD,
NEW DELHI – 110003, INDIA
TEL [protected]
91 – 11 – 24648415
on march 3rd 2010 from pattom palace post office (695004)
RLADA RL[protected] IN
FROM COUNTER NO. 1, OP CODE : CPA

TO :RGR CNL OF ARCTRE,NEWDELHI.

till now i haven,t received the acknowledgement for the same.
I would like to know whether they received the letter or not?