windows RDP not working on SXT5Hpnd bridge

Hi MT,
i hope you are fine. i am an ISP and i have a remote connection for one of my clients. here is the set up.

Remote pc–>other p2p bridge MTU 1500—>L2 Network MTU 1500---->mikrotik SXT5Hpnd bridge MTU 1500------>client CRC125-24G ->HQ win 2008 server.

the remote pc attempts RDP in to the win200 server and fails /freezes at the log in screen, same reaction when the server attempts RDP to the remote site. the routerboard is firmware 3.02. i have attached the firewall settings of my SXT . being a bridge, it has management ip’s only assigned. i would appreciate any advise to deal with this problem since with the clients primary link on a dirrerent freeband solution, the remote desktop works fine. thanks.
firewall.jpg