It probably reassigned a different IP when you switched to wireless.
Use angry grip scanner again to get the new IP and use that IP to log in with your web browser.
When you're logged in just go to the CGminer status page to see if it's hashing. If not you may have a problem with some of your network settings, or some of your pool settings. But if you're on DHCP your router probably assigned the correct network settings, so it's probably your pool settings that are incorrect.