на самом деле Вам нужно попробывать включить в число передаваемых данных не только all_tcp_udp, а и all_ip потому как не исключено что при вашей схеме используются не только tcp порты но и какие-либо протоколы.
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The activity involved in sending and receiving data through the RDP stack is essentially the same as the seven-layer OSI model standards for common LAN networking today. Data from an application or service to be transmitted is passed down through the protocol stacks, sectioned, directed to a channel (through MCS), encrypted, wrapped, framed, packaged onto the network protocol, and finally addressed and sent over the wire to the client. The returned data works the same way only in reverse, with the packet being stripped of its address, then unwrapped, decrypted, and so on until the data is presented to the application for use. Key portions of the protocol stack modifications occur between the fourth and seventh layers, where the data is encrypted, wrapped and framed, directed to a channel and prioritized.
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http://support.microsoft.com/kb/186607