template condition to show something only for the first post of a topic

[NeXuM]

I just want to display something inside the FIRST POSt of a topic

right now i am using this condition:

<if condition="$post[postcount] % $vboptions[maxposts] == 1">
Hello
</if>

It will write "Hello" for the first post of a topic, but it will also write it on first post of page2, and first post of page3, etc....

I want to display it only for the first post of page1 !!

how can i do this??

thanks !!