'installing software encounterd a problem'

an error occuredwhile collecting items to be installed'

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,com.salesforce.ide.api,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 7251ab037ae632a5a9835c7c07210451 and found a79245b216f972a4ca2830f91e999287.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.core,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 44db36699ca7fdd38917fced4e63c3b3 and found febbbb4bb1aa611a45b2e605cb953aeb.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.documentation,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 6d87eb2e76e7e19f7b709682e5272dfc and found 8a27b771d558587322e6f04358fb04ef.