Need help with CACL's between two domain

I have a question that perhaps someone can help answer. We have a

production domain and a test domain and there exists a one way trust

where test trusts production. While logged onto my production XP Pro PC

I used a RUN AS to open a command windows using my production domain

administrator's account and then attempted to run the following CACL's

command involving a folder and a user account in our test environment.

cacls \\c1app422\users\id99998 /T /E /G CFTDomain\id99998:c /r

"CFDomain\Domain Users"

When run, the program it retuns an error message "No mapping between

account names and security IDs was done"

If I go to an XP Pro PC in my test domain and logon with my production

domain administrators account and I execute the exact same conmmand the

command works flawlessly.

So, In summary, I executed the same CACL's command using the same

production domain administrator's account and the only difference is

that one XP PC was a member of the production domain and the other was a

member of my test domain.

Can someone explain why this is working the way it is and is there any

way to make this command work from the production domain?