Hey Crispy,

Thanks for the quick reply.

No worries. You are doing a great job. Keep it up.

Cheers,

- Dilshan

hmm I’m well confused now .

You mean the windows security permissions, right? Well I’ve given network services the full control to the folder so I don’t think there is an issue there.

As I said, the strange thing is, zip file attachments are working perfectly but not other file formats. I’ve seen several posts here, which says exactly the same thing.

But yer it’s interesting that it works for you.

Do u mind sharing with us the versions you use?
dotnetnuke ver, forum ver, windows ver, IIS ver, .net ve, etc.

Thanks,

- Dilshan

Thanks for the reply Erik. I’ve done the change in web.config but no luck; I get exactly the same error as shown below. This happens when browse the file and press the add link.

If it’s a trust issue, then how come zip files works? That’s what I can’t understand. When attached zip files it works but for any other file it gives the below error.

Sorry I’m not questioning; I’m just trying to understand what’s wrong

In my case it's Win2003, IIS 6, .net 2, Forum 03.20.01 and DNN 4.0.3. (it's the same in DNN 4.0.2)

- Dilshan

Server Error in '/' Application.

---

Value cannot be null.
Parameter name: format

[ArgumentNullException: Value cannot be null.
Parameter name: format]
   System.String.Format(IFormatProvider provider, String format, Object[] args) +2835311
   DotNetNuke.Modules.Forum.AttachmentFile.ValidationInfo(Config ForumConfig) +601
   DotNetNuke.Modules.Forum.AttachmentPage.AddFile() +107
   DotNetNuke.Modules.Forum.AttachmentPage.cmdAdd_Click(Object sender, EventArgs e) +58
   System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +105
   System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +107
   System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +174
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102