if - NoMatchingSignatures

[FlawlessHappiness]

I have an if statement that doesn't want to go as i want it to...

ERR: No matching signatures to 'ChangeCharacterMark()'
INFO: Candidates are:
INFO: void ChangeCharacterMark(string&in)

ERR: No matching signatures to 'ChangeCharacterSimon()'
INFO: Candidates are:
INFO: void ChangeCharacterSimon(string&in)


Here is the if statement:

Spoiler below!

void NextLevelCheck(string &in asEntity)
{
if(asEntity == "AreaSimon")
{
if(GetLocalVarInt("SimonReady") == 1 && GetLocalVarInt("MarkReady") == 1)
{
ChangeCharacterMark();
return;
}
}

if(asEntity == "AreaMark")
{
if(GetLocalVarInt("SimonReady") == 1 && GetLocalVarInt("MarkReady") == 1)
{
ChangeCharacterSimon();
return;
}

}

if(GetLocalVarInt("SimonReady") == 0)
{
SetMessage("Messages", "NotDone", 0);
}

if(GetLocalVarInt("MarkReady") == 0)
{
SetMessage("Messages", "NotDone", 0);
}
}

And here are the 2 scripts:

Spoiler below!

void ChangeCharacterSimon(string &in asEntity)
{
FadeOut(2);
SetPlayerActive(false);
CheckPoint("Simon", "SimonStart", "", "DeathHints", "NormalDeath");
PlaySoundAtEntity("", "insanity_whisper", "Player", 0.5f, false);
FadePlayerFOVMulTo(2, 2.0f);
AddTimer("ChangeCharacterSimonTimer", 2, "ChangeCharacterSimonTimer");
}


void ChangeCharacterMark(string &in asEntity)
{
FadeOut(2);
SetPlayerActive(false);
CheckPoint("Mark", "MarkStart", "", "DeathHints", "NormalDeath");
PlaySoundAtEntity("", "insanity_whisper", "Player", 0.5f, false);
FadePlayerFOVMulTo(2, 2.0f);
AddTimer("ChangeCharacterMarkTimer", 2, "ChangeCharacterMarkTimer");
}

I can't say what i have to do with ChangeCharacterMark(); and ChangeCharacterSimon();
Can anobody help?

EDIT: If i write something inside the () then it says "Expected ("