Hi Jeff, It's not this issue ..? (below) Ruben > > If you have any Servers with HP NC7781 NIC's installed (Hp DL > 380's, DL 360's and others), you may experience excessive > retransmits, Outlook hangs, file copy performance issues, cluster > failovers, etc. > > > > Cause: > > The driver defaults to "Offload TCP transmit Checksum" and "Offload > Ip Transmit > > Checksum". This is a performance enhancement designed to relieve > the TCP and IP > > components of the IP checksum calculation overhead and assign that > duty to the NIC. > > Normally this is a preferred method of operation. The HP NC7781 > NICS periodically > > miscalculate the TCP checksum. This causes connection timeouts > periodically and > > more importantly, Outlook hangs between 10 and 20 seconds. With the > latest firmware > > and drivers installed, the issue is still prevalent. The box that > receives a > > response with an incorrectly calculated checksum simply throws the > malformed > > response away, never delivering the data to the application. > > Resolution: > > In the Netcard driver configuration dialog box, disable Offload > checksum > > calculations. This will allow the TCP and IP components to > calculate their own > > checksums.This change does not require a reboot or involve a > service interruption, normal > > > > change control procedures should of course, always be followed!