$this->post['joindate'] at pm area - doesn't work :\

[drbuddha]

hey all,

I tried to code plugin that calculate the registered days of user to use in the postbit tamplate.
And succeeded =]

PHP Code:

$this->post['reg_days'] = round((TIMENOW - $this->post['joindate']) / 86400); 


Hook: postbit_display_start.

But, when I checked that at the pm area, viewing of pm received, it returns only the TIMENOW integer!
When I separated the " TIMENOW " from " $this->post['joindate'] " saw that "$this->post['joindate']" just doesn't return a numeral value in the postbit of pm area.



What code should I use to get the same value at the pm area?