Pocket e-Sword requires that the .NET Compact Framework 1.0 be installed in order to work.
(RedGear won't work as a substitute for .NET CF.
) You can download the .NET CF 1.0 here, in H/PC:Update.
(BTW, as I pointed out in the thread on .NET CF in CE 2.xx, Pocket e-Sword may also work in CE 2.xx devices with the .NET CF 1.0 installed.
)