Xcopy Command Failed In Sql Server 2000 As Scheduled Task

After setting up the linked server connection at the standby server, I
tried to xcopy a file through the sql server 2000 schedule task to the
standby server's shared directory. But it keeps giving me the error
message with
'Invalid Drive Specification'.

My whole process includes
1) set up linked server connection on the standby server
2) set up job to xcopy file as operating system commend in sql server
from the production box(xcopy c:directoryfile.bak
\standby_servere$directory /c)
3) test, but not successful - I am already running the whole schedule
task as a Windows user with Admin authority.)

What did I do wrong or did I miss something?

Thanks in advance