Apt-get upgrade problem.

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http://www.backtrack-linux.org – Today when i started backtrack it requested to upgrade the system.I made the upgrade and after the 10 minutes the upgrade crashed and also the internet.Now when i want to execute apt-get upgrade it says 0 upgraded,0 newly installed,- to remove and 188 not upgraded.It does not want to upgrade. Image: (HowTos)