template conditional 1000 posts

[letsforum]

Hi how can I fix this issue with template conditional. Whenever user has more than 1000 posts it stops working and conditionals like these don't work:

PHP Code:

<div><if $post['postnum'] <= 10 then>Hello</if></div>

---

PHP Code:

<div><if $post['postnum'] >= 10 then>Hello</if></div>

---

PHP Code:

<div><if $post['postnum'] == 10 then>Hello</if></div>

---

However putting {$post['postnum']} shows correct post count!

The problem is in the comma my_number_format 1,000 is not read but the plugin how to fix it?