It is working for me in quotation level also.
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I think in your case the Dynamic check making difference for you ( check the delivery date if it is going beyond horizon).
check with activating document value also.
I have done testing with static check and document value.
Please check the below check points.
1. AGN make it credit active
2. QT assign the correct credit group ( this you have already done)
3. Check in FD32 whether you have assigned the correct risk category or not for payer ( it should be 001 as per your case).
4. Check whether Subtotal A is assigned or not in your pricing procedure.
Please share is this real time requirement if so kindly share your real time requirement so that it would be useful.
As per my personal experience i never came across this kind requirement credit management at Quotation level.
thanks,
Srinu.