no softwares can be installed in ubuntu 10.10 . a message stating that an 'unhandlable error' has occured is displayed

[NAVAGAT PRAKASH]

i am attaching a screenshot of the message displayed
an error message is displayed after i click on the 'install' option for any software in the software center.

[NAVAGAT PRAKASH (navagatprakash)]

hey the problem got fixed..
the following was the detailed error i was getting from aptdaemon::

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 mysqmail package. This might mean you need to manually fix this package.

i entered the following code in the terminal
                                       sudo apt-get install mysqmail

and rebooted..
all working fine now... (: