Memory card???? There is no memory card but a ROM chip inside the ECM, and that too if the ECM is of Daewoo (part No: 1227303) and Cielo (part no: 162......., ID: EX) with blue connector. The one that came in Daewoo GTi has onboard ROM. Can you check which code is written on your existing ECM? In case you have the GTi ECM, it uses additional sensors IAT (Intake Air Temperature) and O2 (Oxygen) to work correctly. Still it should go into diagnostic mode whichever the case is.
If the problem is with your ECM, replacement is the only option and the quoted price of Rs.4000 is reasonable according to the market.