SSL cert not binding in SSRS

Hi all,

I am working with our development team to try to bind an SSL cert onto SSRS. The certificate and its chain look ok. But we keep getting "not trusted" error and the text below. Any ideas please?

Microsoft.ReportingServices.WmiProvider.WMIProviderException: The certificate is not trusted.

--- System.Runtime.InteropServices.COMException: TabletPC inking error code. The property was not found, or supported by the recognizer (Exception from HRESULT: 0x80040241)

--- End of inner exception stack trace ---

at Microsoft.ReportingServices.WmiProvider.RSWmiAdmin.ThrowOnError(ManagementBaseObject mo)

at Microsoft.ReportingServices.WmiProvider.RSWmiAdmin.CreateSSLCertificateBinding(String application, String certificateHash, String ipAddress, Int32 port)