Image src url not work with some image path

I am using below HTML code for showing image in my application.

<img src="../folder/subfolder/imagename" longdesc="description" alt="alt message">

Image name is fetching dynamic from database. It's work with all product detail page, but one of page image are not showing. I have check in database and image folder, image is existing then why it's not showing for particular page? This is link of page where image is not showing.

__http://www.worldoils.com/marketplace/equipdetails.php?id=333&Offshore+Research+Vessel+-+Ice+Class

Please any one explain this reason?

Thanks for your comment, It's some helpful to me. I have notice one more thing, whenever i want to request for product detail page which name contain 'Research' keyword. it give me malware warning specifies adiccionradio.com

I search in database, no any records contain adiccionradio.com link.

开发者_开发技巧

Any one can explain what is happening with it??? For this some of my site page showing malware warning.

Have any idea??

Thanks

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Seema

your image name has extension?
as you write src="../folder/subfolder/imagename"
is it something like src="../folder/subfolder/imagename.jpg"