but if I delete the menu structure (so item>>item>>item) all of my site blow up and the information for these two days gone...also use the K2's advanced feature...it means to tell sh404sef don't use the link only in the tag component of K2? How can I achieve it? And how to tell K2 to use the www.domain.com/tag/tagname.html rewrite condition?

You don't have to tell K2 anything, sh404sef does all the work. All the URLs will go through the sh404 router.

I think there might be an issue with your setup. There is no need to map your all your items in menus (item>>item>>item) except if you need them to act like static pages.

So my proposed solution would be:

• Map all you categories in menus
• DO NOT map any items unless you really need to
• Do not use the hidden menu technic with sh404sef
• Fill in the sh404SEF Integration fields that K2 has

Krikor Boghossian wrote: So my proposed solution would be:

• Map all you categories in menus
• DO NOT map any items unless you really need to
• Do not use the hidden menu technic with sh404sef
• Fill in the sh404SEF Integration fields that K2 has

First, thanks for the responde. unfortunatly I use them like static pages so I can delete the Hidden Menu (no problem at all) but I can't do the first item on the list so I can't "Map all yo categories in menus". So is there another solution in your opinion?

Yes,

Do not delete the entire hidden menu just the menu items towards all categories (the ones described in the K2 blog post).
I don't see why you can't map each category to a specific menu item (you can even assign some items to your hidden menu).

I think if you follow these steps your problem will be solved.