software center unable to install tomcat6

[amitgogte]

 tried to install sun-java6-jdk through commandline ;
but it failed after posting a license agreement from sun .

dpkg failed to install the package ;

then i tried to install from ubuntu software center
Servlet and JSP engine Tomcat6

but it gave me an error ::
An unhandlable error occured

There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks. Please report this error at http://launchpad.net/aptdaemon/+filebug and retry.
Details:
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 768, in simulate
return self._simulate_helper(trans, status_path)
File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 936, in _simulate_helper
return depends, status, self._cache.required_download, \
File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 218, in required_download
pm.get_archives(fetcher, self._list, self._records)
SystemError: E:I wasn't able to locate file for the sun-java6-jre package. This might mean you need to manually fix this package.
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I dont know if it is a similar kind of bug to Bug #672333
but i tried to install a package through terminal using apt-get install
and when it failed then i tried USC and it failed again !!!
now i cannot install anything neither thru terminal nor through USC.