Exception on Microsoft SQL Server Reporting Services PrepareQuery

If you get the exception: {"System.Web.Services.Protocols.SoapException: Cannot create a connection to data source ”. —> Microsoft.ReportingServices.Diagnostics.Utilities.DataSourceOpenException: Cannot create a connection to data source ”. —> Microsoft.ReportingServices.DataExtensions.ReportServerDataProvider.RSDPException: You have specified integrated security or credentials in the

Microsoft Reporting Services exception: rsInvalidReportParameterDependency Forward dependencies are not valid.

Exception: Error    1    [rsInvalidReportParameterDependency]  The report parameter ‘productModelID’ has a DefaultValue or a ValidValue that depends on the report parameter “productModelID”. Forward dependencies are not valid.    C:\Projects\Temp\Report Project1\Report Project1\Products.rdl    0    0    This error occurs, because