Error on some pages and photo's not showing

Hi all,

I'm new here and also fairly new to website development, so please bear with me and forgive the stupid questions.

I have done a lot of work on my new website and was/am close to being ready. But... yesterday I started getting error message 404 when trying to view some of my pages. Also all my photo's have vanished and are either blank white squares or a little square icon in the centre.

So far I am getting errors when trying to view the following pages- Chat, Photos, Videos. Maybe more, but so far these are the main concerns. I'm not aware of anything I've done to cause this, but it is possible.

Please can anyone give me any advice as to what has gone wrong and how to fix it?

Many thanks in advance,
Alison 

Update -

I've had the following response from my Hosting service:

Hello

the problem is somewhere in your dolphin code - it looking for for /Cromson folder - which does not exist
do you recall where you might of put "Crimson" in your coding?
if yes remove it

[Thu Nov 22 11:45:54 2012] [error] [client 66.229.86.48] script '/hsphere/local/home/crimson/cumchatcam.com/modules/index.php' not found or unable to stat, referer: http://cumchatcam.com/Crimson


Also the following image does not exist

[Thu Nov 22 11:45:50 2012] [error] [client 176.248.102.101] File does not exist: /hsphere/local/home/crimson/cumchatcam.com/templates/tmpl_tmd062/images/bg-headline.jpg,

Unfortunately, I've still no idea what I've done!

Any help please, would be much appreciated.

Alison

I've searched all the relevant forum topics and tried numerous suggestions posted previously, nothing has worked, so far....

Help would be very much appreciated! Thanks :)

check your inc/header.inc.php and search for "Crimson" in that file.
Backup first :) 

Thanks for your advice. HSphere finally answered my ticket. Apparently I was missing  /modules/index.php

All sorted now :)