A lot of 404 links

[kovi]

Hello,

I have a lot of 404 links in google webmaster tools and I think is is because I did something wrong in wirtuemart. I use the latest virtuemart. Two days ago a had only 27 404 links and now I have 71! The 404 links have the following style: http://www.mydomain.com/en/shop/toys-for-childs/by,%60p%60.product_sku?language=en-GB

My shop is not multilingual and I don't use the language switche module, I don't understand why appear in the links "en". If I go in virtuemart admin I found the english language default and if I delete the english language from virtuemart admin it appear again automatically after the saving.

A short period I had also the french language on my site and on my shop and that time I played a little time with the language swticher and with the multilingulal shop option but after a few days I deleted the french language but I disabled only a few days after the language switcher module and the plugin.

My template have a custom 404 page but if I click on a 404 link from webmaster tools don't appear my template 404 page. If I click on a 404 link from webmaster tools I receive the following messages:
404 Not Found
The resource requested could not be found on this server!
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I have paid hosting not free hosting from an old and big hosting provider.

Can somebody guide me how to redirect this 404 links. For me it is also good if somebody explain me how can I have products on this 404 links. This 404 links from webmaster tools are not sef links but all my links from the shop are sef links, I also not understand this problem.

[kovi]

Maybe I found the solution.
What do you think if I put the following in robots.txt : Disallow: /*product_sku?language=en-GB