Signature postbit edit?

[dupont24]

I am trying to place adsense in my signature (on my board). I found this code works well...except only I can see it and no other user groups can. I really only want it to show in the first post and to guests and registered groups. I would prefer it not visible to myself so I do not drive up impressions.Any help would be appreciated.

<if condition="$post[postcount] == 1 AND $bbuserinfo[userid] == 1">
<div style="padding:0px 0px $stylevar[cellpadding]px 0px">
Adsense Code Here</if>