The inquiry of Var diff setting of Eloipool Server

Dears,

Recently I was finished installation of Eloipool as my miner's solo mining pool.
However I didn't know how I setup a Var Diff set for my miner.

Even I changed a Share Target of Dynamic Targetting enable option as following
But it still set on diff as 1 or 16 only so miner produce a many reject values.
so Does anyone know about setup a Dynamic target server or var diff option on Config.py of eloipool?

### Settings relating to server scaling/load

# Share hashes must be below this to be valid shares
# If dynamic targetting is enabled, this is a minimum
ShareTarget = 0x000000000fffffffffffffffffffffffffffffffffffffffffffffffffffffff

# Automatically adjust targets per username
# 0 = disabled
# 1 = arbitrary targets
# 2 = power of two difficulties (zero bit counts)
DynamicTargetting = 2

# How many shares per minute to try to achieve on average
DynamicTargetGoal = 100

# Number of seconds hashrate is measured over
DynamicTargetWindow = 120