Hello geekgurl !
There are a few things you have to check
When choosing a location for your wireless router, avoid having the
following items between the wireless router and wireless devices on the
network: long distances, walls, other wireless devices (like cordless
phones), and large appliances.
Don't use two wireless routers in your home unless you are very
knowledgeable about wireless networking. If your Internet Service
Provider (ISP) provides your wireless router as part of their
equipment, don't add another wireless router to it or attempt to change
the existing settings without the ISP's help or knowledge.
Make the following settings on your wireless router, or verify that they've already been made:
1-Change the manufacturer's default name for the network name (SSID) to something unique.
2-Set the broadcast SSID to "on" or "enable". Note that "on" or "enable" is typically the default setting.
On the printer:
1- See if the wireless indicator
lamp is illuminated. Can you turn on the wireless radio from the
control panel of the printer?
Print a Network Configuration page and a Wireless Network Test report from your printer's control panel, if available.
* Does the Wireless Network Test report indicate trouble?
* Do the reports indicate that the printer is connected to your wireless
router, and not to a neighbor's? The network name the printer is
connected to will be shown on the both the Network Configuration page
and Wireless Network Test report.
* Compare the printer's IP address to the gateway IP address. They should
have a similar format (for example, the gateway IP address might be
192.168.0.1 and the printer IP address 192.168.0.5). If the printer has
an IP address similar to 169.254.XXX.XXX, it probably is not connected
to your wireless network.
* On some printers, the Network Configuration Page will list all wireless
networks detected in your area. Is your network listed among those
found? Does it have good signal strength?
* Are there several networks on your same channel or using channels close
to your channel? You should use a channel at least 5 channels away from
the closest used channel. Consider changing your wireless router's
channel to 1, 6 or 11.
* Make sure your computer is not connected through a VPN (Virtual Private
Network). You cannot access devices on your wireless network while
connected to a VPN.
* Disable your operating system's firewall and your security system's
firewall and re-test. If this fixes the problem open ports in the
HP's Network Diagnostic Utility
can also be useful
Visit this link
Check if theres anyway to set an Static IP (does not change) on your printer instead of a Dynamic Hp (constantly changes)
Good Luck !