Google having trouble accessing my site

[ClaireH-184886]

Hi google is having problem accessing my site. each day it is bringing up access denied errors and when i have checked what this means i have the following

Access denied errors

In general, Google discovers content by following links from one page to another. To crawl a page, Googlebot must be able to access it. If you’re seeing unexpected Access Denied errors, it may be for the following reasons:

• Googlebot couldn’t access a URL on your site because your site requires users to log in to view all or some of your content. (Tip: You can get around this by removing this requirement for user-agent Googlebot.)
• Your robots.txt file is blocking Google from accessing your whole site or individual URLs or directories.
  • Test that your robots.txt is working as expected. The Test robots.txt tool lets you see exactly how Googlebot will interpret the contents of your robots.txt file. The Google user-agent is Googlebot. (How to verify that a user-agent really is Googlebot.)
  • The Fetch as Google tool helps you understand exactly how your site appears to Googlebot. This can be very useful when troubleshooting problems with your site's content or discoverability in search results.
• Your server requires users to authenticate using a proxy, or your hosting provider may be blocking Google from accessing your site.

Now i have contacted my hosting company who said there is not a problem but said to read the following page http://www.tmdhosting.com/kb/technical-questions/other/robots-txt-file-to-improve-the-way-search-bots-crawl/

i have read it and as far as i can see i have my file set up right which is listed below. they said if i still have problems then i need to contact google. can anyone please give me advice on what to do. the errors are responce code 403

User-agent: *
Disallow: /administrator/
Disallow: /cache/
Disallow: /components/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /libraries/
Disallow: /media/
Disallow: /modules/
Disallow: /plugins/
Disallow: /templates/
Disallow: /tmp/
Disallow: /xmlrpc/

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