I got a DNS Problem / 2pfsense 2pcs cant ping/nslookup from one to the other one

[Kleber]

Hey,
i need some help.
My Setup you can see in the picture below.

My Problem: i cant ping/nslookup from PC1 to PC2 i think my DNS i configured wrong...or something with both interfaces re2.
Internet ist working on both.

Thanks !

[Kleber]

Update: i can now ping from PC2 and can reach PC1 but i cant ping from PC1 to PC2