error message

When i try to scan some of the computers on our domain i get this message:

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FAILURE : No response received from workstation while connecting.

Please report the problem to the system administrator, with the Error Code - 1133367606016.
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Now these are laptops with a wireless connection, but they all log into the domain, and I even had the people plug into a wired connection and get the same message. The OS is Windows XP Pro.

Any help would be appreciated thanks.