Arguement error

[maxy2010]

ZRuleDeathMatch.cpp(20) : error C2660: 'ZScreenEffectManager:rawArrow' : function does not take 2 arguments
ZRuleDeathMatch.cpp(71) : error C2660: 'ZCharacter::ChangeWeapon' : function does not take 2 arguments

First :
void ZScreenEffectManager:rawArrow(rvector& vTargetPos) - how do i define 2 arguements for below code to compile
ZGetScreenEffectManager()->DrawArrow(Pos, 240.0f);

Second :
void ZCharacter::ChangeWeapon(MMatchCharItemParts nParts) - how do i define 2 arguements for below code to compile
pChar->ChangeWeapon(MMCIP_PRIMARY, false);