Router blocking Remote Desktop connection

> Firewall logs show that it blocks something [at the same time i try connecting].

Are you looking at the firewall-logs "inside" the BlueCurve, or at the log-files inside Windows Firewall[or inside whatever "Internet Security" package, such as Norton Internet Security] that you are using?

> I also tried connecting with the same rdp connection from another network and it works.

Windows RDP can be configured to allow Remote Connections only from a specific range of IP-addresses. Have you configured this?