I really don't see how anyone can help you unless you post the whole recipe. There are so many ways to mix curry powder and ofc if you want the best fragrance from your curry powder - toast the spices and grind them with a mortar/pestle.

Also if the smell isn't there - it's most likely the curry leaves that's lacking.

For best results you need to tumbuk the chilli padi, lemongrass, garlic and ginger - that's the best way to extract flavour from those.