korn vs bash

[BROWNH]

I'm running RH 6.0 with a bash shell, but have a korn script I need to
execute. When I try to run it, I get:
        bash: /path.../scriptname: No such file or directory

Do I have to rewrite the script as bash or is there a way to run a korn
executable from a bash prompt?

The script starts:
        #!/bin/ksh
        #$Id: startup.ksh, v.1.9... Exp $
        # shell script to start up the server 
        # This script known to work with standard Korn Shell under Solaris

Haines Brown