Using MSVC 6, Allegro 4.2.1, WindowsXP
I have followed these instructions

STATIC COMPILATION
In release mode I get these errors:

Linking... LINK : warning LNK4049: locally defined symbol "_draw_sprite" imported LINK : warning LNK4049: locally defined symbol "_allegro_message" imported LINK : warning LNK4049: locally defined symbol "_al_findnext" imported LINK : warning LNK4049: locally defined symbol "_al_findfirst" imported LINK : warning LNK4049: locally defined symbol "_make_absolute_filename" imported LINK : warning LNK4049: locally defined symbol "_set_gfx_mode" imported LINK : warning LNK4049: locally defined symbol "_load_bitmap" imported character.obj : error LNK2001: unresolved external symbol __imp__draw_sprite_h_flip OLAF___Win32_Release/OLAF.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe. OLAF.exe - 2 error(s), 7 warning(s)

This is the line that makes the error

draw_sprite_h_flip(dibuja, animation.e_frame[act_frame].e_map ,abs(animation.e_frame[act_frame].x_offset + x) ,abs(y));

I tried using the 3 static modes, and I get the same results

DYNAMIC COMPILATION
In release mode I get these errors:

Linking... alleg.lib(alleg42.dll) : error LNK2005: _draw_sprite already defined in olaf.obj olaf.obj : error LNK2001: unresolved external symbol _allegro_error olaf.obj : error LNK2001: unresolved external symbol _key olaf.obj : error LNK2001: unresolved external symbol _screen olaf.obj : error LNK2001: unresolved external symbol _font OLAF___Win32_Dynamic_Debug/OLAF.exe : fatal error LNK1120: 4 unresolved externals Error executing link.exe. OLAF.exe - 6 error(s), 2 warning(s)

I am doing things well now, and set up six configurations for realease, debug and profile in dynamic and static modes.
But there is a problem is driving me crazy:

In dynamic debug mode I get this
compiling... character.cpp file_name_generator.cpp frame.cpp maps.cpp olaf.cpp timer.c Linking... OLAF.exe - 0 error(s), 0 warning(s)

But in static debug mode I get this:

Compiling... character.cpp file_name_generator.cpp frame.cpp maps.cpp olaf.cpp timer.c Linking... LINK : warning LNK4049: locally defined symbol "_draw_sprite" imported LINK : warning LNK4049: locally defined symbol "_destroy_bitmap" imported LINK : warning LNK4049: locally defined symbol "_allegro_message" imported LINK : warning LNK4049: locally defined symbol "_al_findnext" imported LINK : warning LNK4049: locally defined symbol "_al_findfirst" imported LINK : warning LNK4049: locally defined symbol "_make_absolute_filename" imported LINK : warning LNK4049: locally defined symbol "_set_gfx_mode" imported LINK : warning LNK4049: locally defined symbol "_load_bitmap" imported character.obj : error LNK2001: unresolved external symbol __imp__draw_sprite_h_flip OLAF___Win32_Debug/OLAF.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe. Creating browse info file... OLAF.exe - 2 error(s), 8 warning(s)

WHY??? I followed the instructions, I tried several combinations, but it doesn't work.
Compiling in release static mode works fine but add some warnings.
In every configuration I get different results, I hate that.