newbie: problem with page.replace

Hi, I'm going to add some functionality to my application. I need to replace two page's elements with each other. All works fine, but I would like to refresh only changed elements, not all on the page. I think ajax should hel me but I have a problem with rendering the replaced elements.

In the .rjs file I have:

page.replace @photo1.id.to_s, '<h1>test</h1>'

and this works - it pretty replace appropriate element with given html string and also render the page correctly.

But this one, doesnt work at all. page.replace @photo1.id.to_s, :partial => "replace2"

In the _replace2.rhtml I have a temporary text like: <h1>test</h1>

Does someone know what could be the reason of this? Why :partial makes that nothing is rendered?

Thanks in advance for any answers.