downloading files on ubuntu 9.10

I did some research here and i couldn't find anything related to my problem.
This is my first time using linux so i'm new with ubuntu. After installing ubuntu i wanted to instal flashplayer. i found this link on this site: http://get.adobe.com/flashplayer/
I choose the correct version that is ubuntu 9.4+ and click agree and install now. This is what it says: This link needs to be opened with an application. Send to:
apturl
choose an Application

I choose apturl and click ok and this is what i get: Software index is broken

This is a major failure of your software management system. Please check for broken packages with synaptic, check the file permissions and correctness of the file '/etc/apt/sources.list' and reload the software information with: 'sudo apt-get update' and 'sudo apt-get install -f'.
Close.

What should i do.

Thanks in advance for all the replies. I'll keep you updated on how it goes with the solutions you will give me.

Talk to you soon.

Luka

P.S.: Greetings from Slovenia

When you go to a site that

When you go to a site that requires flash when using Firefox you will see a bar appear with a button on the right side labeled “Install Missing Plugins” , just choose Adobe Flash Player!

Do this instead

Open a terminal and run this command:
sudo apt-get install flashplugin-installer

Look in "Applications>Accessories>Terminal"

Now restart your browser

downloading files on ubuntu 9.10

Nuthur way is to use synaptic from GUI menu to get it installed for system!!! [system>administration>synaptic package manager
'use the search box to find and then select from choices and install'] These may not always be the latest version but are at least more proven to work with the setup.
Or Applications>Add remove> ALL> Show third party> search box [flash] yadayadayada! Therez multiple ways to do things some menu driven and or all from the command line. Also can install plugin.
I don't have it installed in system but rather in Mozilla Firefox and this gets me by so far.
That'z TOOLS>add-ons>plug-ins [select and install]
Njoy %:))SW

thanks guys....i got it now.

thanks guys....i got it now. thank you SW. the method using synaptic package manager did the magic i needed:=)

talk to you guys soon!!