First of all - Your metamod's plugins,ini should look so:
linux addons/amxmodx/dlls/amxmodx_mm_i386.so
linux addons/statsme/dlls/statsme_mm_i386.so
linux addons/hlguard/dlls/hlguard_mm_optimized_i686.so
linux addons/podbot/podbot_mm_i386.so
I have no idea why do You need statsme and AMX MOD X (AMX MOD X has the same and even better stats functionality than StatsMe), btw...
Another thing - how did You install podbot mm? Read my previous post - install first the fullpack, then - if it's working, update the binaries only.
One thing more - podbot mm has been compiled for linux with gcc v3.4.5 - so if Your gcc of Your system is older You need to upgrade the system first.
The last thing - You may have also some problems with some linux libraries. Read the sticky about problem with
loading podbot mm under linux.
I hope some of my hints can help You.