web.page not refreshing through gateway

I am connecting to the On-Premise SharePoint list and folder.  I can refresh the data from the desktop. 

The source is:

= Web.Page(Web.Contents("http://......../AIM/EQ%20File%20Transfer/_Archived%20AIM%20Requests", [Timeout=#duration(0, 0, 60, 0)]))

The gateway connects: 

I am using a service user

However, on refreshes, I get the following error:

{"error":{"code":"DM_GWPipeline_Gateway_InvalidConnectionCredentials","pbi.error":{"code":"DM_GWPipeline_Gateway_InvalidConnectionCredentials","parameters":{},"details":[{"code":"DM_ErrorDetailNameCode_UnderlyingErrorCode","detail":{"type":1,"value":"-2147467259"}},{"code":"DM_ErrorDetailNameCode_UnderlyingErrorMessage","detail":{"type":1,"value":"The credentials provided cannot be used for the Web source. (Source at http://laurelnet/sites/maintenance/AIM/EQ%20File%20Transfer/Forms/AllItems.aspx.)"}},{"code":"DM_ErrorDetailNameCode_UnderlyingHResult","detail":{"type":1,"value":"-2147467259"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourceKind","detail":{"type":1,"value":"Web"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourcePath","detail":{"type":1,"value":"....../AIM/EQ%20File%20Transfer/Forms/AllItems.aspx"}},{"code":"Microsoft.Data.Mashup.CredentialError.Reason","detail":{"type":1,"value":"CredentialInvalid"}},{"code":"Microsoft.Data.Mashup.MashupSecurityException.DataSources","detail":{"type":1,"value":"[{\"kind\":\"Web\",\"path\":\"....../AIM/EQ%20File%20Transfer/Forms/AllItems.aspx\"}]"}},{"code":"Microsoft.Data.Mashup.MashupSecurityException.Reason","detail":{"type":1,"value":"CredentialInvalid"}}],"exceptionCulprit":1}}} Table: AIM File Transfer.

Also when I look at Data Source Credentials,  it just spins: