Is fop2 running?
pgrep fop2
Is it binding to port tcp/4445?
netstat -lnp | grep 4445
Perhaps FOP1 was reinstalled and started, if that happens FOP2 will appear to start ok but it will fail shortly afterward because it cannot bind to an already opened/used port. In that case, you will have to stop and disable fop1 and try to start fop2 again.