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Exception thrown on client proxy call to open

Posted By:      Posted Date: October 03, 2010    Points: 0   Category :WCF
Exception thrown System.InvalidOperationException: The communication object cannot be modified while it is in the Opened state.

The following code throws this exception:

                if (dataAcesssProxy == null)
                    dataAcesssProxy = new CompetellaDataAccessService.CompetellaDataAccessClient();
                    dataAcesssProxy.ClientCredentials.Windows.ClientCredential = new System.Net.NetworkCredential("someuser", "password", "domain");

                    dataAcesssProxy.InnerChannel.Faulted += new EventHandler(InnerChannel_Faulted);

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