About An Msdos Game

Sir
But I Have Windows 98 Se It Worked Only For One Time And Then It Showing The Same Errors And I Am Using Dos Version 4.10 Then Where Is The Problem In The Documentation I Have'nt Found Any Thing
The Documentation Is As Follows

Desert Strike Pc

First Of All Thank You Buying Desert Strike, We At Gremlin Interactive Ltd
Hope That It Provides You With Many Hours Of Entertainment.

Changes & Additions
-------------------

1.) If You Find The Realistic Movement Of The Helicopter A Little
Difficult To Control, Press F4 While You Are In The Game Itself And This Will
Switch Off The Momentum. Pressing F4 Again Will Return The Game Control
Back To How It Original Should Be.

2.) In The Manual It States That The Game Requires 550k Of Base Memory.
This Has Since Be Lowered, And Now Only Requires 544k To Run.

3.) After Completing The First Game Of Desert Strike. When You Return To Dos
The Game Will Automatically Save A File Into The Game Directory Called
Desert.cfg This Contains All The Setup Options From The Last Game, So That It
Automatically Set's The Game Up To Your Requirements.
If For Any Reason You Do Not Want The Game To Load Up These Options,
Simply Delete The File 'desert.cfg' From Your Game Directory.


Thats All For Now, But Make Sure You Keep A Look Out For The Follow Up
To Desert Strike, Jungle Strike, Which Should Be Out Soon.

Please Help Me