if condition not working for members who posted over 999 posts?

[CrazyLady]

This condition is for viewing a field on someone's profile page...

<if condition="$bbuserinfo['posts']>50 & $userinfo['posts']>50">
text here
</if>

the problem is, that the second condition isn't recognized if a member has posted over 999 posts. My goal here is to allow a field to be shown only if the member of the profile being viewed has posted over 50 AND the member viewing the profile has posted over 50.

please help asap if you can
thanks
CL