Windows 7: Printer on 7 not being accessed by XP

My main pc is using Windows 7 64 bit build 7100, my kids pc is using XP Pro. Previously we had the networking with my main pc using Vista working perfectly, the XP pc could print on the printer connected to my pc, since I put Windows 7 on this pc I have the networking with file sharing etc working great but cannot get the XP pc to be able to print anymore. The printer is an Epson RX690 Any help would be appreciated

can you get as far as connecting to the printer?

no the xp pc doesn't see the printer at all

I'm going to assume that you have setup the printer share in your Homegroup?

tried and I get a box coming up with "Printer settings could not be saved. Operation could not be completed (error 0x000006d9) the printer works perfectly in windows 7 though

Is it a networked printer or one connected via USB / IEEE1384 (aka Printer cable)?

connected standard via the usb cable

Are you using the driver supplied by the manufacturer or the native Windows 7 driver?

In my case this was caused my having Windows Firewall Disabled.

You can marked this issue as solved!
The offending program causing this error is Windows Firewall, here's what you need to do to resolve this issue....
If like me you have disabled windows firewall, I use ZoneAlarm's Security Suite, you need to re-enable the firewall in order to share the printer.

If you have disabled or turned off Windows Firewall. (and this error in my case was caused by exactly that EXACTLY this Error code)
Step #1 - Disable any other firewall you may have installed. Stop it from loading at boot and restart your PC.

Step #2 - Go to the Admin Tools Folder >> Services >> Windows Firewall >> Double click and either set it to Manual or Automatic and Save.

Step #3 - Open Control Panel >> System & Security >> Windows Firewall >> Turn Windows Firewall On or Off >> (Enable) Turn on Windows Firewall >> Save
Then go to Restore Defaults >> Click Restore Defaults Button >> Save
(you only need to do this IF you changed any settings for the firewall, but it's still a good idea and will ensure there are no problems when proceeding)

Step #4 - Click Control Panel Home >> View Devices & Printers >> Select/Click your Printer >> Display Printer Properties >> Sharing >> Share this Printer >> OK

Step #5 - Go Back to Windows Firewall and Turn it back off >> Save

Step #6 - Go Back to Services >> And set Windows Firewall to Manual (or disable if you prefer, I recommend Manual)

Step #7 - Restart & Re-enable your preferred firewall to start at Boot >> Reboot

Step #8 - Take a deep breath and sigh with relief!