1.6.5遇到的致命问题

九万里

在win7+dx11的环境下,下面两个致命错误不稳定交替出现,有没人知道啥原因？

22:40:15: Loading library RenderSystem_Direct3D9.dll
22:40:15: OGRE EXCEPTION(7:InternalErrorException): Could not load dynamic library RenderSystem_Direct3D9.dll.  System Error: 动态链接库(DLL)初始化例程失败。
in DynLib::load at ..\src\OgreDynLib.cpp (line 81)

22:27:22: D3D9RenderSystem::_createRenderWindow "", 0x0 windowed  miscParams: FSAA=4 externalWindowHandle=1639362 vsync=false
22:27:22: D3D9 : Created D3D9 Rendering Window '' : 800x600, 32bpp
22:27:22: D3D9 : WARNING - disabling VSync in windowed mode can cause timing issues at lower frame rates, turn VSync on if you observe this problem.
22:27:22: OGRE EXCEPTION(3:RenderingAPIException): Failed to create Direct3D9 Device: Not available in D3D9RenderWindow::createD3DResources at ..\src\OgreD3D9RenderWindow.cpp (line 606)