Enabled Projects - Apply to these projects - Unable to remove last enabled project

Browser Safari Version 4.0.4 (6531.21.10) on Mac OS X Version 10.6.2 JIRA Service ___ Java System Properties _______ atlassian.standalone : JIRA catalina.base : /root/atlassian-jira-enterprise-4.0.2-standalone-403 catalina.home : /root/atlassian-jira-enterprise-4.0.2-standalone-403 catalina.useNaming : true common.loader : ${catalina.home}/common/classes, ${catalina.home}/common/i18n/*.jar, ${catalina.home}/common/endorsed/*.jar, ${catalina.home}/common/lib/*.jar file.encoding : UTF-8 file.encoding.pkg : sun.io java.awt.graphicsenv : sun.awt.X11GraphicsEnvironment java.awt.headless : true java.awt.printerjob : sun.print.PSPrinterJob java.class.version : 49.0 java.home : /usr/java/jdk1.5.0_22/jre java.io.tmpdir : /root/atlassian-jira-enterprise-4.0.2-standalone-403/temp java.naming.factory.initial : org.apache.naming.java.javaURLContextFactory java.naming.factory.url.pkgs : org.apache.naming java.runtime.name : Java(TM) 2 Runtime Environment, Standard Edition java.runtime.version : 1.5.0_22-b03 java.specification.name : Java Platform API Specification java.specification.vendor : Sun Microsystems Inc. java.specification.version : 1.5 java.util.logging.config.file : /root/atlassian-jira-enterprise-4.0.2-standalone-403/conf/logging.properties java.util.logging.manager : org.apache.juli.ClassLoaderLogManager java.vendor : Sun Microsystems Inc. java.vendor.url : http://java.sun.com/ java.vendor.url.bug : http://java.sun.com/cgi-bin/bugreport.cgi java.version : 1.5.0_22 java.vm.info : mixed mode, sharing java.vm.name : Java HotSpot(TM) Client VM java.vm.specification.name : Java Virtual Machine Specification java.vm.specification.vendor : Sun Microsystems Inc. java.vm.specification.version : 1.0 java.vm.vendor : Sun Microsystems Inc. java.vm.version : 1.5.0_22-b03 mail.mime.decodeparameters : true org.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER : true os.arch : i386 os.name : Linux os.version : 2.6.18-164.11.1.el5 package.access : sun., org.apache.catalina., org.apache.coyote., org.apache.tomcat., org.apache.jasper., sun.beans. package.definition : sun., java., org.apache.catalina., org.apache.coyote., org.apache.tomcat., org.apache.jasper. server.loader : ${catalina.home}/server/classes, ${catalina.home}/server/lib/*.jar shared.loader : ${catalina.base}/shared/classes, ${catalina.base}/shared/lib/*.jar sun.arch.data.model : 32 sun.boot.library.path : /usr/java/jdk1.5.0_22/jre/lib/i386 sun.cpu.endian : little sun.cpu.isalist : sun.io.unicode.encoding : UnicodeLittle sun.java.launcher : SUN_STANDARD sun.jnu.encoding : UTF-8 sun.management.compiler : HotSpot Client Compiler sun.os.patch.level : unknown tomcat.util.buf.StringCache.byte.enabled : true user.country : US user.dir : /root/atlassian-jira-enterprise-4.0.2-standalone-403 user.home : /root user.language : en user.name : root user.timezone : Australia/Sydney