Prior to Wincache 1.3.7.0 rerouting was broken, see this in the official forums:
http://forums.iis.net/t/1213205.aspx?Function+reroute+not+working]
After that version, file rerouting functions are enabled by default, to disable them use:
wincache.reroute_enabled=0