Tom,
Channel 6 should be ok but you may have better results on channel 11.
First run Delete Print Jobs to remove stuck print job(s) from the queue, then restart your computer.
Make sure the printer is not usb cable connected.
Start, control panel, programs and features, your printer, uninstall.
Restart your computer. Make sure the printer was removed. Manual Printer Driver Removal
With your computer online, insert the Dell V525w Printer disk. Choose new installation, network and follow the instructions. It should prompt you to connect your printer and also for your network and password.
When you're done with that part, it should prompt you to unplug the usb cable. Wait for about a minute and see if the WiFi light is green(I'm hoping it has a WiFi light)
If that does not work, you may want to drop back the Security to WPA-PSK(TKIP) Security(Personal) and try it.
Try reading...
I also have these articles that may help...
Troubleshooting Setup for the Dell 525w and 725w AIO Inkjet Printers
Troubleshooting Network Problems on the Dell V525w and V725w AIO Inkjet Printers
Rick