Multiple images not showing

I must be doing something wrong but I cannot find it, none of my products show multiple images. Using the latest version of zen cart uploaded main image to images/main folder; I then uploaded small images to the images/main folder using naming convention C&FVIOLIN_001_small, then uploaded large images to images/large folder using naming convention C&FVIOLIN_001_LRG. Main image shows up but nothing else, have tried this many times over but cannot solve the problem.
URL for violin
http://www.topstring.org.uk/shop/index.php?main_page=product_info&cPath=21_81&products_id=458:lamo:

Why not using Image Handler?
It's a great add on for managing product images.

http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=117

You are also breaking a lot of rules re: image naming convention

That violin (very nice instrument, by the way!) has an image called:

C&FVIOLIN 001.jpg

You have a SPECIAL CHARACTER (&) and a SPACE and all the letters are UPPER CASE..

I would call that image:

cfviolin_001.jpg (no uppercase, no special characters, no spaces)

... and then call my ADDITIONAL IMAGES for that specific product:

cfviolin_002.jpg
cfviolin_003.jpg
cfviolin_004.jpg

... and everything would work beautifully... Especially as I aslo have Image Handler 2 to control image formatting for me...

Thanks for the help people, will try to implement your suggestions. Now to wrap my head around image handler.

i been following the instructions but i still cant get additional images working in IH2...already upload the additional images via IH2 interface but they just dont show on my store...

did i miss out anything?

below are my admin > configuration > images

Title Value Action
Small Image Width 100
Small Image Height 100
Heading Image Width - Admin 57
Heading Image Height - Admin 40
Subcategory Image Width 100
Subcategory Image Height 57
Calculate Image Size true
Image Required true
Image - Shopping Cart Status 1
Image - Shopping Cart Width 50
Image - Shopping Cart Height 50
Category Icon Image Width - Product Info Pages 57
Category Icon Image Height - Product Info Pages 40
Top Subcategory Image Width 150
Top Subcategory Image Height 85
Product Info - Image Width 200
Product Info - Image Height 200
Product Info - Image Medium Suffix _MED
Product Info - Image Large Suffix _LRG
Product Info - Number of Additional Images per Row 3
Image - Product Listing Width 100
Image - Product Listing Height 80
Image - Product New Listing Width 150
Image - Product New Listing Height 150
Image - New Products Width 150
Image - New Products Height 150
Image - Featured Products Width 100
Image - Featured Products Height 80
Image - Product All Listing Width 100
Image - Product All Listing Height 80
Product Image - No Image Status 1
Product Image - No Image picture no_picture.gif
Image - Use Proportional Images on Products and Categories 1
IH resize images yes
IH small image filetype no_change
IH small image background 255:255:255
IH watermark small images no
IH zoom small images yes
IH small image compression quality 85
IH medium image filetype no_change
IH medium image background 255:255:255
IH watermark medium images no
IH medium image compression quality 85
IH large image filetype no_change
IH large image background 255:255:255
IH watermark large images no
IH large image compression quality 85
IH large image maximum width 750
IH large image maximum height 550
IH watermark gravity Center