C# - HTTP Verb POST Used To Access Path Not Allowed

I am not using URL Rewriting, my app works fine until I try to hit a .PDF file or even a .TXT file via a link that I have dynamically generated into the PostBackUrl of a LinkButton. The path is correct. I have thoroughly researched this issue on here and most of the issues are with people using a POST action or not or the URL Rewriting, which I am not. In IIS Error looks like:

Server Error in Application "DEFAULT WEB SITE/EVENTS"Internet Information Services 7.5
Error Summary
HTTP Error 405.0 - Method Not Allowed
The page you are looking for cannot be displayed because an invalid method (HTTP verb) is being used. Detailed Error Information
Module StaticFileModule
Notification ExecuteRequestHandler
Handler StaticFile
Error Code 0x80070001
Requested [URL]
Physical Path C:projectsEventsEventDocs48ea946f-e948-e011-ad73-00155d0e670b2011.pdf

Code to dynamically generate the url to click to is here:

public void DocumentsRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
LinkButton LinkToDoc = (LinkButton)e.Item.FindControl("LinkToDoc");
Label FileNameLabel = (Label)e.Item.FindControl("FileNameLabel");
LinkToDoc.PostBackUrl = "~/EventDocs/" + SessionValue.EventId.ToString() + "/" + FileNameLabel.Text;
LinkToDoc.Text = FileNameLabel.Text;
}