Remote Desktop to Vista machine from XP SP2

I am here at the office attempting to use remote desktop to connect into my Vista Ultimate SP1 laptop.

I get connected and logon, get the desktop and everything drawn on screen, the it totally freezes.

After a minute or so I get the dialog box showing that I have been disconnected and it will attempt to reconnect.

Attempting to logon at the console of that laptop now, I put in my password, it says Welcome, then a message comes up stating , "This network connection does not exist."

If I click on OK and attempt to logon again, it gives me the same message.

If I wait about 5 minutes, I am able to logon again.

In the event log I am seeing from source TermDD an event 56 stating, "The Terminal Server security layer detected an error in the protocol stream and has disconnected the client."

Is this because I am using SP2 on the XP machine instead of SP3 ?

I've seen similar issues but only on occasion when connecting from the same XP box to my home desktop running Ultimate SP1. Every attempt I may to get into this laptop results in the same thing.

Any thoughts on this? I'd appreciate any input!

Thanks!

I guess nobody else has seen this?