Terrapin

The encryption level hasn't changed between XP (RDP 5.1) and .Net 3628 (RDP 5.1.1). Everything is @ 128 bit. Is your TS in App Server or Remote Desktop mode? That can make a difference for resolution. In any event, one of these should fix. 1. Install MSRDPCLI.exe from .Net Server installation media (\Support\Tools\MSRDPCLI.exe) 2. Install ADMINPAK.MSI from .Net Server installation media (\i386\Adminpak.msi) & use the Remote Desktop Connections MMC to connnect. If your TS is in App Server mode and it doesn't work, whack HKEY_LOCAL_MACHINE\Software\Microsoft\MSLicensing\Store\LICENSE00x from the registry on the XP client. If you still have no joy, let us know what errors are being posted in the Event Log on the TS box.