If you have definitely followed the instructions to the letter it should work, so [s]I can not suggest anything more without checking out your installation.

If you want me to take a look then feel free to PM me your site address, a temp admin user (with admin permissions - Can Administer Settings for editing options, Can Administer Styles for editing templates, Can Administer Users for editing User Profile Fields and finally Can Administer Plugins for editing products), and ftp access details, without these I can not help you. I will look when I have time, and even if I have a look, I can not guarantee that I will be able to fix it, especially if your site is not in English (I only read/write in English), so it is up to you what you want to do. You can revoke these after I have helped you out.

If you do not want me to take a look, then[/s] there is nothing else I can do to help.

it doesn't work 3.7.4

I just installed this on a test board with v3.7.4 PL1 and it works as it should, this has been tested on all versions of v3.7.x (from 3.7.4 PL1 down to 3.7.0) and works with all versions so far.

Make sure you have followed the instructions to the letter and it should work, regardless of what style you use (as long as they have a standard postbit and legacy postbit).

Hot Blue style

It works fine with the Hot Blue style, see the attachment, I have not come across one style yet it does not work with. You sure you did all the steps correctly???

Yes the same
do you want to a give a screenshot to know where is the problem

If you have definitely followed the instructions to the letter it should work, so [s]I can not suggest anything more without checking out your installation.

If you want me to take a look then feel free to PM me your site address, a temp admin user (with admin permissions - Can Administer Settings for editing options, Can Administer Styles for editing templates, Can Administer Users for editing User Profile Fields and finally Can Administer Plugins for editing products), and ftp access details, without these I can not help you. I will look when I have time, and even if I have a look, I can not guarantee that I will be able to fix it, especially if your site is not in English (I only read/write in English), so it is up to you what you want to do. You can revoke these after I have helped you out.

If you do not want me to take a look, then [/s]there is nothing else I can do to help.

what i should do in style

That is an admin permission, there is nothing else I can do to help without looking at your installation.

I'm the admin ..
what to change or to add in the style?
because you didnt mentioned anything about style in the PDF file