Error using SAML authentication

Dear experts,

We are using SAML 2 authentication in SAP CRM 7 EHP3 system.

We use a service that tries to open URL of file stored in the content server.

Unfortunately we receive an error message:

Since your browser does not support JavaScript, you must press the Continue button once to proceed

The reason of the error is that service should perform SAML authentication via ADFS form and perform automatic submission of the form.

But the service cannot submit the form automatically, unlike the end user that can click Continue button.

How is it possible to solve this issue?

Thanks in advance,

Sergey