在Inno Setup中加载具有依赖项的DLL在带有“无法导入DLL”的卸载程序中失败，但在安装程序中有效

卸载程序时出现此错误：

无法导入dll：<utf8> c：\ TestProg \ IsStart.dll

我在这里做错了什么？有人可以帮我解决这个问题吗？

CheckO4TaskMngrSvcStopAndUninstall停止并删除O4TaskManager Service：

这是代码：

[Files]
Source: "IsStartServer.dll"; DestDir: "{tmp}"; DestName: IsStart.dll
Source: "IsStartServer.dll"; DestDir: "{app}"; DestName: IsStart.dll
Source: "sqlite3x86.dll"; DestDir: "{src}"; DestName: sqlite3.dll
Source: "sqlite3x86.dll"; DestDir: "{app}"; DestName: sqlite3.dll
Source: "sqlite3x64.dll"; DestDir: "{app}"

[Code]
function TaskMngrInst: LongBool;                                                
external 'CheckO4TaskMngrSvcStopAndUninstall@files:IsStart.dll,sqlite3.dll stdcall loadwithalteredsearchpath setuponly';

function TaskMngrUninst: LongBool;                                                
external 'CheckO4TaskMngrSvcStopAndUninstall@{app}\IsStart.dll stdcall uninstallonly';

procedure CurStepChanged(CurStep: TSetupStep);
begin
  if CurStep = ssInstall then
    begin
      TaskMngrInst();
    end;
end;

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
  if CurUninstallStep = usUninstall then
    begin
      TaskMngrUninst();
      DeleteFile(ExpandConstant('{app}\sqlite3.dll'));
      DeleteFile(ExpandConstant('{app}\IsStart.dll'));
      RenameFile('{app}\sqlite3x64.dll)', '{app}\sqlite3.dll');
    end;
end;