can not open outlook on terminal services

all my users have option to work from home on terminal services but i have two users that have problem ,when they connect to terminal server from there home and they click to open outlook they get errore "failed to open microsoft outlook"what can be the reason?
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Michael WorshamStaff Infrastructure ArchitectCommented:
A couple of pre-questions...

1) What platform is the terminal server running on?
2) What version is the Outlook release?
3) Do you have enough terminal server licenses available?
buildingitAuthor Commented:
server 2003 with outlook 2003
Michael WorshamStaff Infrastructure ArchitectCommented:
What does your event logs state on the terminal server in regards to the problem at hand?

Also, are your users using roaming profiles? If so, you might want to check this thread:

And just in case, check this one as well...

You receive an error message when you use a Terminal Services Client to start Outlook 2003

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