dll.. XP vs. 98/Me

Any ideas?
look at this dll (the ShellExecute line), it doesn't open the exe in 98 or Me but will in XP.  

---------
library EZServe;

uses
  SysUtils, Classes, dialogs, ShellAPI, Windows, Messages;

{$R *.res}

function SendData(mWnd,aWnd: HWND; data, parms: PChar; show,nopause: LongBool): integer; Stdcall;
 var hWnd: THandle; cds: CopyDataStruct;
begin
    hWnd := FindWindow(nil,'EZServe v1.0');
    if hWnd <> 0 then
      begin
       cds.dwData := 3232;
       cds.cbData := StrLen(Data);
       cds.lpData := data;
       SendMessage(hWnd, WM_COPYDATA, 0, LongInt(@cds));
      end;
  Result := 1;
End;

function OpenEzServe(mWnd,aWnd: HWND; data, parms: PChar; show,nopause: LongBool): integer; Stdcall;
 var hWnd: THandle;
begin
    hWnd := FindWindow(nil,'mIRC');
    if not FileExists('EZServe.exe') then Showmessage('EZSere.exe not found.');
    ShellExecute(hWnd,'open','EZServe.exe',data,nil,SW_SHOWNORMAL);
    Result := 1;
End;

exports SendData,OpenEzServe;

END.