On Sep 19, 9:34 ¨Âí¬ Èõîô Êï¼êïîá®èõîô®®®Àçíáéì®ãïí¾ ÷òïôåº > Is the library installed? > Is the library in the load path? Yes, the library is installed, but I will check the LOADPATH maybe you just got it. Thanks for responding. -- Mathspeedy <3 Linux and Ruby Canada rocks !