Perfect match in Subject line is not caught

I created a specific entry in the Blocklist for some recurring spam, but it is not stopping any of it.

The entry only targets the Subject line with specific text that is in every one of these messages. Why is it not filtered?

Thanks.

You can use the Window ‣ Log command to see which messages SpamSieve has processed. If SpamSieve thought an incoming message was good, it will show up as Predicted: Good and it will say why. One possibility here is that maybe the message was sent from an address in your Contacts (which has higher priority than the blocklist).

thank you