[syslinux] help

[Prof S W Damle]

High all,
 
In WinXP, I have created file "image.iso" using mkisofs, but unable to
postprocess with the "isohybrid".
I worked as follows:
 
cd F:\syslinux-4.05\utils
 
F:\syslinux-4.05\utils> isohybrid F:\image.iso
 
and received >'isohybrid' is not recognized as an internal or external
command,
operable program or batch file.
 
What next?
 
Thanks in advance.
 
Prof S W Damle