Apache Web Server

So I got an Apache Web Server, installed it on my PC, and, though I've got a dynamically changing IP-address, my folder htdocs is accessible from the internet (what I see is an index.html page). I included some links on this index.html to various files (jpegs, htmls, ...). They work fine (though, I've got no idea how). But the link to a mdb file opens a dialog field: open/download. The download works fine, but clicking open leads to something like 'this server is not secure' and the browser denies to open it. I know that problems related to a Web Server have nothing to do with c++, so, can you recommend me a page with a forum for beginners to Web-hosting. (I've also heard that learning Perl can be of some use. As I am an absolute beginner to Web-hosting: What can Perl-scripts do?)

It is right.. It does not allows the MDB file to be downloaded since the MDB file can be the site database.. Like this forum has its own database and if it allowed to be downloaded you could download all the info which is unsecure.. But you can change this setting and download can be allowed...