Cisco Router Not Passing Traffic Between Networks

We have an old Cisco 1800 in a test lab.  
The two network interface are configured as follows:

FastEthernet 0/0

FastEthernet 0/1

Each interface is connected to an un-managed Netgear 5 port switch
Each Netgear switch also has a couple of PCs that are configured with an IP on the respective network (either 192.168.5.X or 192.168.6.X)
For some reason, we CANNOT pass traffic from a device on one switch to a device on the other switch through the Cisco router.
This was working in the past, but lab has not been used in several months.
Bottom-line, it is not routing traffic between and then beyond to the destination IP.
I can't provide the config because it is in an isolated environment.
However, when I do a show run, one of the lines says:
no ip routing
From the router via telnet, I CAN ping a device on either the 192.168.5.X or 192.168.6.X network
Also from either side, I can ping as far as interface 0/0 or interface 0/1 so it seems to know how to pass traffic that far
It just won't pass traffic beyond that to another device on the opposite side.
Any help would be appreciated.  I feel like we are just a couple of commands away from getting this router properly working.

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Soulja53 6F 75 6C 6A 61 Commented:
conf t
ip routing

ip cef  (just in case also)

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Soulja53 6F 75 6C 6A 61 Commented:
The no ip routing command turns the router into like an end host. Good for lab scenarios. Maybe someone was using it for such a purpose.
Soulja53 6F 75 6C 6A 61 Commented:
Also make sure the pc's are configured with their respective default gateways.
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dpmoneyAuthor Commented:
This is perfect, thank you!  Will the WR final command ensure it persists through the next router reboot?
Soulja53 6F 75 6C 6A 61 Commented:
Yes, it will save the config to startup.
dpmoneyAuthor Commented:
Excellent - thanks again!
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