To get to correct work AMX and Podbot mm together You have to get AMX 0.9.9
b. This version contens the fix for bots/players recognizing. You can get it here (thanks to KaszpiR - my Polish colleague):
http://djeyl.net/forum/index.php?showtopic=39787
About all story for this known problem You can read here:
http://forums.bots-united.com/showthread.php?t=2309
The people were writing here about AMX X, but the bug was the same in both mods. Finally fixed in AMX0.9.9b and AMX MOD X 0.20 (in 1.0 too).