Cannot use a leading ..

Hello, When I'm almost finnished with mine first asp.net site, it errors

At my test server at home, it runs perfect. It's in a virual dir. (So i thought a virtual dir act like you put it in the root)

When I upload the site to my hosting (in the root) it gives me this error: see under here

I hope someone can help me... I have no idea what it is!

Server Error in '/' Application.
------------------------------------------------------------ --------------------

Cannot use a leading .. to exit above the top directory.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Cannot use a leading .. to exit above the top directory.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace:

[HttpException (0x80004005): Cannot use a leading .. to exit above the top directory.]
   System.Web.Util.UrlPath.Reduce(String path) +701
   System.Web.Util.UrlPath.Combine(String basepath, String relative) +304
   System.Web.UI.Control.ResolveClientUrl(String relativeUrl) +258
   System.Web.UI.WebControls.HyperLink.AddAttributesToRender(Ht mlTextWriter writer) +59
   System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlText Writer writer) +17
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +17
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +72
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +72
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextW riter writer) +44
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +263
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +72
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
   System.Web.UI.Page.ProcessRequestMain() +1929

------------------------------------------------------------ --------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573

yes, that's what the error says.

But what i don't understand is why it works in a virtual dir in not in a root of the site. Do i have to compile it in the root dir then?

after reading and checking my code for 1000 times, i found out that i  somewhere in a hyperlink control used ../../something.aspx, that's 1 time ../ too much

But it works now