Help needed with custom card script

[qwertyuiop265000]

So I need help with this card. You see, it's supposed to let me gqin control of any creature it deals combat damage to, but it just... doesn't? Help me!

Name:The Corruption
ManaCost:W U B R G C
Types:Creature Horror
PT:2/1
K:Echo:3
K:CARDNAME must be blocked if able.
T:Mode$ DamageDone | ValidSource$ Card.Self | ValidTarget$ Creature | CombatDamage$ True | TriggerZones$ Battlefield | Execute$ DBGainControl | Execute$ DBCopy | TriggerDescription$ Whenever CARDNAME deals combat damage to a creature, create a token copy of The Corruption and gain control of the defending creature (if it's still alive, of course.)
SVar:DBGainControl:DB$ GainControl | Defined$ TriggeredTargetLKI | NewController$ You
SVar:DBCopy:DB$ CopyPermanent | Defined$ Self | NumCopies$ 1
S:Mode$ Continuous | Affected$ Card.Self | AddPower$ X | AddToughness$ X | TriggerDescription$ The Corruption gets +1/+1 for each other creature named The Corruption.
SVar:X:Count$Valid Creature.namedThe Corruption+Other
SVar:BuffedBy:Creature.namedThe Corruption
SVar:PlayMain1:TRUE
Oracle:Whenever The Corruption deals combat damage to a creature, create a token copy of The Corruption. Gain control of the defending creature. The Corruption gets +1/+1 for each other creature named The Corruption.