Buildfile: C:\Documents and Settings\Robert-Jan\Bureaublad\Eclipse\C2\eclipse\workspace\L2_Gameserver\build.xml init: compile: [javac] Compiling 404 source files to C:\Documents and Settings\Robert-Jan\Bureaublad\Eclipse\C2\eclipse\workspace\L2_Gameserver\build\classes [javac] C:\Documents and Settings\Robert-Jan\Bureaublad\Eclipse\C2\eclipse\workspace\L2_Gameserver\java\net\sf\l2j\Base64.java:91: cannot access java.lang.Object [javac] bad class file: C:\Program Files\Java\jre1.5.0_01\lib\rt.jar(java/lang/Object.class) [javac] class file has wrong version 49.0, should be 48.0 [javac] Please remove or make sure it appears in the correct subdirectory of the classpath. [javac] private final static String PREFERRED_ENCODING = "UTF-8"; [javac] ^ [javac] 1 error BUILD FAILED: C:\Documents and Settings\Robert-Jan\Bureaublad\Eclipse\C2\eclipse\workspace\L2_Gameserver\build.xml:110: Compile failed; see the compiler error output for details. Total time: 2 seconds