Error 0x000006d9 on a shared printer in Windows 7 (Solved)

In my case:

a. Click "Start", go to run, type "services.msc" (without quotation marks) in the open box and press Enter.

Note: If you are prompted for an administrator password or confirmation, type your password, or click Continue.

b. Right click the "Windows Firewall" service and choose Properties.

c. Click "Startup type" option and click "Automatic".

d. Click "Start" to start your Windows firewall

e. Click OK and share the printer again.

If the issue persists, please proceed to the following steps.

Suggestion 2: Verify Network settings

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a. Click start and click Control Panel.

b. Double click Network and Sharing Center.

c. Select "Change advanced sharing settings" option in the right panel.

d. Please turn on "Network discovery" and "File and printer sharing".

However, if the error message still occurs, I recommend to reinstall the printer driver and reset the Printer Spooler for a test.

For your reference, we can refer to the link below:

http://support.microsoft.com/kb/2000007

First solution is solve my issue.
Sharing printers does not work if your firewall is disabled in windows 7.

Thanks, this resolve my problem also. 

Nice catch.