My Mac Pro running 10.6 Snow Lep cannot connect to App store. I want to upgrade to Mountain Lion but cannot. Can anybody help?

All attempts to connect to App store have failed with my Mac Pro.  Running 10.6 Snow Lep and want to upgrade to Mountain Lion.  How can I do it???
So far all advice useless.

You need to be running at least 10.6.6, and 10.6.8 is better. If you have the App Store icon, you are probably already at that version.
10.8 is not available to all Mac Pro 65lb tower models. Those made before the 2008 model will not be able to Upgrade at any price.
10.7 is available if the mac App Store is working, but you will need to CALL Apple Online Store Support to arrange to buy it over the phone. They will sell you a special download code.

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    ERA AND MCM wrote:
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  • I just got a macbook pro as a gift and i wanted to upgrade to mountain lion for free but i don't know where the laptop was brought? can anyone help me?

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    Upgrading to Mountain Lion - http://www.apple.com/osx/how-to-upgrade
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  • Upgrade to Mountain Lion but get told my mac is not compatible

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    I have:
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      Number of Processors:
    2
      Total Number of Cores:
    4
      L2 Cache (per Processor):
    4 MB
      Memory:
    11 GB

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