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You've replaced all the relevant components so I wonder about your thermocouple connection. Is it dry (no pipe dope)and tight at the gas valve? is only the top 1/3 (max) of the thermocouple in the pilot flame?
Do you have a strong pilot? You need more that just the tip of the thermocouple in the flame the top 1/4 should be engulfed by the flame.
Your description doesn't add up. You shouldn't be able to even light the pilot unless the indicator is set to pilot.