Updating Eclipse Android ADT

An error occurred while collecting items to be installed
session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Multiple problems occurred while downloading.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/plugins/org.eclipse.wst.common.frameworks_1.2.102.v201201190400.jar.pack.gz
HttpClient connection error response code 503.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/plugins/org.eclipse.wst.common.frameworks_1.2.102.v201201190400.jar
HttpClient connection error response code 503.
Multiple problems occurred while downloading.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/plugins/org.jboss.netty_3.2.4.Final-201112281337.jar.pack.gz
HttpClient connection error response code 503.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/plugins/org.jboss.netty_3.2.4.Final-201112281337.jar
HttpClient connection error response code 503.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/features/org.eclipse.egit_1.3.0.201202151440-r.jar
HttpClient connection error response code 503.
HTTP Server 'Service Unavailable': http://ftp.ussg.iu.edu/eclipse/releases/indigo/201202240900/aggregate/features/org.eclipse.wb.layout.group.feature_1.3.0.r37x201202060028.jar
HttpClient connection error response code 503.