consume php from .NET WS

[Alex]

I have an .NET client consuming PHP SOAP service. I am getting an exception
when I attempt to access the WS from the company simplicity. Could you please
help. Here is the error.
InnerException {"The specified type was not recognized:
name='ArrayOfStrings',
namespace='sba-miami-csm.symplicity.com/ws/report_api.php', at <report_list
xmlns=''>."} System.Exception {System.InvalidOperationException}