Remote Desktop Error Code 0x1024

We are trying to RDP from a WINXP SP3 system to a WIN7PRO-x64.  We have no problem RDP'ing from another WIN7 or WIN2K8 R2 system.

This is what the error code says:
"Remote Desktop Error Code 0x1204 - Because of a protocol error detected at the client, this session will be disconnected.  Please try connecting to the remote computer again."
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Ernie BeekExpertCommented:
Normally this means that the port that is used for RDP is already being used by another application....
am guessing your Windows XP computer is PRO and not HOME correct?

also is remote access enabled?
i would say use a 3rd party app like VNC or Dameware
I would install the newest RDP client for XP which I think is version 7.

That should resolve your issues.

I hope this helps !
this is due to Diffie-Hellman key generation failed.....for this one system is not able to handshake  with other.

Diffie-Helman  alogorithm allow you to create a communication channel between two different system. TRy with VNC once..or else you may need to repair your operating system.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Internet Protocols

From novice to tech pro — start learning today.