advanced guestbook installation

Hello,
First of all; excuse me for being really simple! I am only a part time, self taught webmaster (although I think the title may be a little overrated for me!)

I have installed guestbook using my cpanel, then I copied the files onto my server & renamed the index.htm (as I already have one) to Guestbook.htm. I am using frontpage so I put the renamed page into the navigation and joy of joys there it is on my website where it should be. However I added comment to test the guestbook and it will only show if i go into admin, look at the comment and then return to guestbook. I've obviously done something wrong. Can somebody please help me. I have searched the forum but I have to say I dont really understand any of the posts relating to the guestbook.
Please help, please keep it simple.

Thanks very much in advance for your time.
TG

If we are talking about Advanced guestbook then the file needs to be i nthe guestbook folder as to maintain the file structure. Also the page needs to be .php and not .htm.

sorry posted twice, ignore this.

Thank's Carbonize. That did the trick.
Its easy when you know how !!

TG