Irrlicht Engine

I downloaded Bullet Engine source and included it in my program. But it wrote:
fatal error C1083: Cannot open include file: 'LinearMath/btVector3.h': No such file or directory
I have Visual Studio 7.0
What can I do with it?

Problem , my 3DS Max cannot export in .x
But it can export in these files:
*.Al
*.ASE
*.ATR
*.BLK
*.DF
*.DWG
*.DXF
*.W3D

Can I create animated mesh in 3DSMax? Or how can I animate *.3ds files?

You can click on file->export and export them as *.3ds
Irrlicht suport .3ds, but it has some problems with textures

I am using the (i think) newest version, 1.4.1

Console is writing:

...
Could not open file of texture: STUCCO.jpg
Loaded texture: ../../media/STUCCO.jpg
Could not open file of texture: STUCCO.jpg
Loaded mesh: ../../media/mesh.3ds
Needed 0ms to create OctTree SceneNode. <1 nodes, 60 polys>
Needed 0ms to create OctTreeTriangleSelector. <1 nodes ...

Thank you, but it is still doing the same

I have 3D Studio Max version 7.0
I created a box and exported it into *.3ds and moved it into media folder. Compiled my program, but it ran without the good brick texture. The console wrote, that it cannot find grydirt1.jpg
I found it in 3Dsmax folder and copied it into media folder. I executed my ...