bash: /usr/local/bin/rsync: Argument list too long

[victor]

I get this error when I try to copy a directory with a lot of files: 
"bash: /usr/local/bin/rsync: Argument list too long"

The exact command is: "/usr/local/bin/rsync -rsh=/usr/bin/rsh -r 
--delete --perms --owner --group /mail/spool/imap/user/wex/* 
root at 192.168.250.68:/mail/spool/imap/user/wex".

BUT, if I try tris command it works: "/usr/local/bin/rsync 
-rsh=/usr/bin/rsh -r --delete --perms --owner --group 
/mail/spool/imap/user/* root at 192.168.250.68:/mail/spool/imap/user/wex".

So I see that rsync does not copies the files if in the root of the 
source directory are too many files. But if they are too meny files in 
any oter directory in works.

I need the first command to work.
How can I do this?

Thank you.