Assuming you are using the DHCP from your other router to set the IP address of the PC you are attempting to access the WAP with, you will be on a different network.
Your DHCP router's IP address: 192.168.0.1
Your PC's IP address: 192.168.0.x
Your WAP's IP address: 192.168.100.46
(Network portion of IP address is italicised)
Assuming the use of a standard Class C subnet mask in all cases (255.255.255.0), your PC will not be on the same network as your WAP.
Change the IP of your PC to 192.168.100.47
Change the IP of your WAP to, say, 192.168.0.2 (and create a static entry in your DHCP settings of your DHCP router, to prevent this address being given out to other devices)
I've kind of lost my train of thought here but hopefully that should help.