OGRE EXCEPTION(3:RenderingAPIException): Failed to DrawPrimitive : Invalid call in D3D9RenderSystem::_render

I am working a game in C++ with OGRE and CEGUI. The game works fine on our workstations but when we try to run it on our game platform, which is Samsung Ultra Mobile Personal Computer (UMPC), the game crashes and the log says this:

OGRE EXCEPTION(3:RenderingAPIException): Failed to DrawPrimitive : Invalid call in D3D9RenderSystem::_render at ..\src\OgreD3D9RenderSystem.cpp (line 2719)

[Exception: 4] "Error details in ogre.log" in Star::OgreGraphicsSystemImpl::startRenderCycle (.\Graphics\Ogre\OgreGraphicsSystemImpl.cpp:174)

And ogre.log says pretty much the same thing:

11:09:42: Can't assign material HairScruffy to SubEntity of hair-male-scruffy.meshHeadMount13552 because this Material does not exist. Have you forgotten to define it in a .material script?
11:09:42: Mesh: Loading shoe.mesh.
11:09:42: WARNING: shoe.mesh is an older format ([MeshSerializer_v1.30]); you should upgrade it as soon as possible using the OgreMeshUpgrade tool.
11:09:42: Texture: shoe.jpg: Loading 1 faces(PF_R8G8B8,256x256x1) with 5 generated mipmaps from Image. Internal format is PF_X8R8G8B8,256x256x1.
11:09:43: Mesh: Loading ../media/models/rain.mesh.
11:09:43: WARNING: ../media/models/rain.mesh is an older format ([MeshSerializer_v1.30]); you should upgrade it as soon as possible using the OgreMeshUpgrade tool.
11:09:43: Texture: rain.png: Loading 1 faces(PF_A8R8G8B8,512x512x1) with 5 generated mipmaps from Image. Internal format is PF_A8R8G8B8,512x512x1.
11:09:44: OGRE EXCEPTION(3:RenderingAPIException): Failed to DrawPrimitive : Invalid call in D3D9RenderSystem::_render at ..\src\OgreD3D9RenderSystem.cpp (line 2719)
11:09:45: Render Target 'rtt/34656128' Average FPS: 8.26735 Best FPS: 32.07 Worst FPS: 0.247944
11:09:45: *-*-* OGRE Shutdown

Again, this only happens on the UMPC. I can't find file OgreD3D9RenderSystem.cpp anywhere on my computer. Here is the code for OgreGraphicsSystemImpl:

void OgreGraphicsSystemImpl::startRenderCycle()
{
try {
bool keepGoing = true;
while(keepGoing)
{
#ifdef NOVIDEO
keepGoing = mRoot->_fireFrameStarted();
keepGoing &= mRoot->_fireFrameEnded();
#else

//Ogre::WindowEventUtilities::messagePump();
Ogre::WindowEventUtilities::messagePump();
keepGoing = mRoot->renderOneFrame();
//std::stringstream ss;
//ss << mWindow->getAverageFPS();
mWindow->update();

// update the movie
if(mVideo)
mVideo->update();
#endif
}
//mRoot->startRendering();
}
catch(Ogre::Exception &e)
{
Logger::getSingletonPtr()->logf(Logger::LOG_CRITICAL, e.getFullDescription().c_str());
THROW_EXCEPTION(Exception::SUBSYSTEM_ERROR, "Error details in ogre.log");
}
}

where line 174 is:

THROW_EXCEPTION(Exception::SUBSYSTEM_ERROR, "Error details in ogre.log");

Does anybody have any idea what is going on here?