Running Sourcemod-1.7.0
Pulled "AdvancedInfiniteAmmo.smx" into plugins folder
Deleted \server\tf\cfg\AdvancedInfiniteAmmo.cfg hoping the plugin would create a new one once I threw up the server but noting. Plugin doesn't run.
For the record I dont know what "new syntax" means.
That could be your problem, 1.7.0 is over 5 months old at this point. You should update to the 1.7.3 snapshots here: http://www.sourcemod.net/snapshots.php