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當我嘗試從Eclipse helios安裝Blackberry 5.0 sdk（從BB sdk 7.0下載的BB站點）並且下載sdk jar和然後把這個下面的錯誤扔給我？在eclipse上安裝黑莓sdk5.0時出現錯誤
An error occurred while collecting items to be installed
session context was:(profile=SDKProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at https://swdownloads.blackberry.com/Downloads/auth/contactFormPreload.do?code=DC727151E5D55DDE1E950767CF861CA5&dl=EF73B8E6C5570A3E25806E3C73616BD0.
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target