Problem with creating menu button -"Product page"

I was trying to create first product using article in your FAQ ("Your first test sale") for mroe then 2 hours but i still get the same mistake: 404 when i`m trying to open product page.
What have i done:
1. Added a product in Hikashop.
2. Created button im my main menu for product.
3. Bound product to this button.

The worst thing - it`s not a hard job, everything seems so easy, but whatever i tryed to do (cleaned cache and etc..) i always got 404 page, when tryed to enter in product page.

PS. Product shows well in HikaShop Content Module, i even can add him to shopping cart.
Screenshots:
1. - menu button.
2. - chosen type for this menu
3. - product page
What did i miss?
Thx for help.

404 errors usually happen because of the SEF system of Joomla and the way the menu item is configured.
For example, if you have another menu item with the same alias, it could create such 404 error.
The simplest is to turn off the SEF in the joomla configuration but the real solution would require more investigation in your menu items.

Oh, didn`t see your message.
Yes, SEF system was a problem so i`ve fixed it with sh404SEF.
Anyway, thx for reply.