Hi, I am having problems with the contact form on my website www.mextours.co.uk whenever someone fills out the form and clicks "send", they get the following message: 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed or is temporarily unavailable.

I dont understand why this is happening as I have had no problems inserting contact forms in my other websites.

Please can someone help me fix this? Thanks