Saprouter - Host did not respond times

Hello,

We have configured the saprouter with a VPN, the test connection in SM59 is OK.

When I try to start  "R/3 Support" in SAP Support Portal, the SAP Service Connector gives me the message: "The service connection has been opened successfully." but SAPRouter status does not get "connect", it keeps on "Host did not respond x times".

How can I find the problem? If the SAP Connector shows me "The service connection has been opened successfully."?

Regards