Understanding My Current Router Problem with NIM-ES2-4 Card installed

[JNCloud]

R1:
FE0/0: 192.161.20.1/24
Local Lan IP
FE0/1: 192.161.21.1/29
Outside Lan IP
Nat PC1 192.161.21.2
Nat PC2 192.161.21.3
Nat PC3 192.161.21.4
IP Route 192.161.20.0 255.255.255.0 192.161.21.0
IP Route 192.161.21.0 255.255.255.0 192.161.20.0

R2:
FE0/0: 192.161.20.1/24
Local Lan IP
FE0/1: 192.161.22.1/29
Outside Lan IP
Nat PC1 192.161.22.2
Nat PC2 192.161.22.3
Nat PC3 192.161.22.4
IP Route 192.161.20.0 255.255.255.0 192.161.22.0
IP Route 192.161.22.0 255.255.255.0 192.161.20.0

R3:
FE0/0: 192.161.21.6/29
Receive data from R1
FE0/1: 192.161.22.6/29
Receive data from R2
Vlan100:
Local Devices at R3
192.161.24.1/28
NIM-ES2-4:
GE0/1/0:
Switchport access vlan 100
GE0/1/1:
Switchport access vlan 100
GE0/1/2:
Switchport access vlan 100
GE0/1/3:
Switchport access vlan 100
IP Route 192.161.21.0 255.255.255.0 192.161.24.0
IP Route 192.161.22.0 255.255.255.0 192.161.24.0

Hello,
I am working in packet tracer and trying to understand why my NIM-ES2-4 will not allow me to ping or pass traffic to R1 and R2. The layout above the issue is I can ping devices when logged into R3 using the NAT IP but when attempting the same thing on from a PC connected to the NIM card using example 192.161.24.11. I can’t ping any of the NAT IPs, but I can ping the Interface IP that is in R3. I have been reading lots of things online and think I have gone in a circle withing these forums and decided to finally post. I am under the impression I am missing something simple here. Any advice is appreciated.

Kind Regards,

[Mark Elsen]

         - FYI : Community group for Packet Tracer project questions

   M.

[JNCloud]

Thank you for the reply but poking around in these files that i have already found are not helpful the have provided me concepts and ideas to attempt but without explaining why I am have my problem in the first place? I would like to understand why I having the problem I am having and possible reasons why one solution is better over the other. Feedback is appreciated

[Richard Burts]

I do not claim expertise in PT and have no advice to offer about that aspect. But I do note one thing in the router information that you you post: the static routes on each router make no sense and should be deleted.