Attachments not displaying

[Webzcas]

This is an extremely weird issue and I must admit I am a bit lost. I think it could possibly be a mod installed on the forum.

Anyhow, image attachments are not displaying within posts. In IE 8 a red x is displayed, however in firefox a link to the image is displayed. However upon clicking on the link a VBulletin message in TURKISH is displayed.

Please see the attached image.

According to google translate it says:

This forum is not authorized to download the plug-in.

The version of VBulletin is 3.86 pl1

I have other sites hosted on the same server running VB and there are no problems with attachments.

Any ideas?

Is this something sinister? Or is it likely caused by a modification?

[Marco van Herwaarden]

Sounds like a modification issue. What is the actual link when you get a red X? (right click -> properties)