Unable to Connect 17Track with My Shipping Carrier

Hi,

I recently change my API to 17track.
After connecting the account using 17track plugin with the given API, my tracking number still can’t return with a positive result.

API: 17track (with their plugin installed)
with 2000 credits in my account.

My shipping carrier: Singapore Post (default)

Please kindly assist on this matter.

Thank you.