ps/2 mouse error

when I press shift while compiling in 0021 I get:

In file included from C:\Dokumente und Einstellungen\Nutzer\Desktop\Programmieren\Java\arduino-0021\hardware\arduino\cores\arduino/WProgram.h:6,
                 from C:\DOKUME~1\Nutzer\LOKALE~1\Temp\build9053873873924970999.tmp\ps2_mouse.cpp:4:
c:/dokumente und einstellungen/nutzer/desktop/programmieren/java/arduino-0021/hardware/tools/avr/lib/gcc/../../avr/include/math.h:439: error: expected unqualified-id before 'double'
c:/dokumente und einstellungen/nutzer/desktop/programmieren/java/arduino-0021/hardware/tools/avr/lib/gcc/../../avr/include/math.h:439: error: expected `)' before 'double'
c:/dokumente und einstellungen/nutzer/desktop/programmieren/java/arduino-0021/hardware/tools/avr/lib/gcc/../../avr/include/math.h:439: error: expected `)' before 'double'

This is the red part of the log only because the hole one is to long.

Perhaps you can send me your MD5 Cheksum of your .zip folder.
My one is: 66830F19F83B628E5214ED0BDE8B1893

Not that we understand wrong I want to emulate a mice with the Arduino and not connect a mice to the Arduino. And for that I use the Library of the bottom from the page below.