lost domain controller leads to SQL server 26-Error

[THE PROBLEM
]TITLE: Connect to Server
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Cannot connect to m1dwdev\dw_dev.

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ADDITIONAL INFORMATION:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)



Many are discussed in http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx

but none is related to domain controller.

The error message in event viewer is:

Event Type: Error
Event Source: NETLOGON
Event Category: None
Event ID: 5719
Date: 4/18/2008
Time: 4:47:37 AM
User: N/A
Computer: M1DWDEV
Description:
No Windows NT or Windows 2000 Domain Controller is available for domain M1. The following error occurred:
There are currently no logon servers available to service the logon request.
Data:
0000: 5e 00 00 c0 ^..à


[THE SOLUTION]
Disable/Enable network. Problem solved.