At the DHCP you should change the following (mind you , the wording may be a bit different):
IP pool Starting Address: 192.168.1.100
Netmask (if applicable): 255.255.255.0
Size of Pool: 50
DNS1: 75.75.76.76
DNS2: 75.75.75.75
You may also want to disable DHCP for IPv6, just to be on the safe side.
And make sure that all your computers' network adapters are set to automatically get IP addresses.

OK,
set the Default Gateway address to 192.168.1.1
leave subnet mask as is
DHCP beginning address at 192.168.1.100
DHCP ending address at 192.168.1.150
we are going to leave IPv6 as it is, but on your computer's wireless adapter settings - uncheck IPv6.
After this is done - unplug your wireless USB adapter and then plug it back in.
OK,
set the Default Gateway address to 192.168.1.1
leave subnet mask as is
DHCP beginning address at 192.168.1.100
DHCP ending address at 192.168.1.150
we are going to leave IPv6 as it is, but on your computer's wireless adapter settings - uncheck IPv6.
After this is done - unplug your wireless USB adapter and then plug it back in.

Bummer
Did you uncheck the IPv6 on your network adapter?
OK, let's set a static IP on your computer. Open your network adapter's IPv4 settings and select "Use the following IP address" option, then enter:
IP: 192.168.1.50
Netmask: 255.255.255.0
Default Gateway 192.168.1.1
DNS1: 75.75.76.76
DNS2: 75.75.75.75
Let me know if there is a difference.