Could not find http://dl.google.com/eclipse/plugin/3.6 neither download zip file

I just can't install Google Plugin from eclipse helios (3.6)

Adding update site http://dl.google.com/eclipse/plugin/3.6 site  returns "Could not find  http://dl.google.com/eclipse/plugin/3.6"

I also tried downloading the zip files but the following error is displayed on the page:

http://dl.google.com/eclipse/plugin/3.6/zips/gpe-e36-latest-updatesite.zip

<Error>

<Code>NoSuchKey</Code>

<Message>The specified key does not exist.</Message>

</Error>

Regards,

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