problem with synaptic package manager

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http://www.ubuntux.org – I have installed ubuntu 9.10 into my laptop 2 days ago while installing adobe-flashplugin(using sudo apt-get install) it got struck up then i stopped the terminal( using ctrl+z). later i downloaded adobe flashplugin from adobe website. while installing it again got struck in the process. I then deleted the plugin from my laptop completely. From an error report was being displayed on the panel as follows "An error occurred ,please the package manager from right click menu or apt-get in the terminal in the terminal to find out what is wrong.The error message was'Unknown error:'(E:The package adobe-flash plugin needs to be reinstalled,but I can't find it.)'This usually means that your installed packages have unmet dependencies." later i tried to install vlc from the terminal .it is giving that" E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) read more (Distributions)