undefined reference

i can't seem to get this to reference the library...please help...

Arduino: 1.6.0 (Windows 7), Board: "Arduino Leonardo"

Build options changed, rebuilding all

LCDTest.cpp.o: In function setup': /Arduino/LCDTest.ino:18: undefined reference to CrystalFontz635::printAt(unsigned char, unsigned char, char*, bool)'
LCDTest.cpp.o: In function __static_initialization_and_destruction_0': /Arduino/LCDTest.ino:6: undefined reference to CrystalFontz635::CrystalFontz635()'
collect2: error: ld returned 1 exit status
Error compiling.

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LCDTest.ino (582 Bytes)