Blocks can't be placed on TNT

System.getProperty('os.name') == 'Linux'
System.getProperty('os.version') == '3.4.0'
System.getProperty('os.arch') == 'i386'
System.getProperty('java.version') == '1.7.0_45'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '32'