Rest Receiver Adapter

Hi guys,

i have a problem with rest receiver adapter in SAP PI 7.4 single stack version. Endpoint is awaiting a header field for authorization. So i put in "HTTP Headers" the following value:

URL-Pattern: 

I'm using Proxy.

Error i receive:

With postman app call is working. Here if i not sending header key i receive same "Forbidden" error.  Now i have no idea whats wrong.

Has anyone ideas?

Regards,

Marcus