psexec + virtual pc

[Freedominizer]

Hi everyone,

I set up two windows 7 on virtual pc 2007 and gave them different IP, I can
ping either of them from the other one. I set the network on the two machines
as "local only" and both are "workgroup" means they are not part of a domain.

The question is I am trying to run psexec from one machine to run an
application on the other one, it allways returns with "Access is denied"
despite using a password after it refused fisrt time because the password was
blank.

another quick question, how can set them as part of domain if that the only
solution to get psexec work.

any help will be appreciate