Problem in Saptsati

[ajaygiri786]

Jai Gurudev and all brothers & sisters,

 

I have problem regarding puja.I m doing worship durga saptsati since last 3 years.In the Durga saptsati ---

1. I read durgadatris(32 name) and sidh kunjikastrotre along with samput mantra in the morning.

2. In the evening, i read kavach durga satnam strotram & tantroktam devisuktam.

But i don't feel any good thing regard mata.

Is my puja method is wrong?

If it is wrong than plz tell me the right method.

And one other question about this mantra "Om aim hreem kleem chamundayayi bichee namah"

Second mantra is "Om aing hreeng kling chamundayaya vichee namah"

What is the difference between these mantras?