Please Help!!! memory limit from php5?

[gmartoo]

Fatal error: Out of memory (allocated 16777216) (tried to allocate 52 bytes) in /www/-/www/root/on1/classes/MySQL.php on line 71

if I delete some products everything work great...
my hosting company says the script on the shop is too heavy!!!

my .htaccess file
DirectoryIndex /on1/index.php
AddType application/x-httpd-php5 .php
# URL rewriting module activation
RewriteEngine on

# URL rewriting rules
RewriteRule ^([0-9]+)\-([a-zA-Z0-9-]*)\.html(.*)$ product.php?id_product=$1$3 [L,E]
RewriteRule ^([0-9]+)\-([a-zA-Z0-9-]*)(.*)$ category.php?id_category=$1$3 [L,E]
RewriteRule ^([0-9]+)__([a-zA-Z0-9-]*)(.*)$ supplier.php?id_supplier=$1$3 [L,E]
RewriteRule ^([0-9]+)_([a-zA-Z0-9-]*)(.*)$ manufacturer.php?id_manufacturer=$1$3 [L,E]


# Catch 404 errors
ErrorDocument 404 /404.php

my php5.ini file

memory_limit = 32M

infophp is attachet - o.php.txt


Sorry for my broken english

o.php.txt