Help Modify and rename class

[Puffiamo]

To modify class i found this:

Code:

self.custom_class[0]["primary"] = "dragunov_mp";

so i do a funcition like this:

Code:

setClassMod()
{
    self.custom_class[0]["primary"] = "dragunov_mp";
    self.custom_class[0]["secondary"] = "dragunov_mp";
    self.custom_class[1]["primary"] = "l96a1_mp";
    self.custom_class[2]["primary"] = "wa2000_mp";
    self.custom_class[3]["primary"] = "psg1_mp";
}

but if i call it on onplayerjoinedteam() team it doesnt work, i need to re-join team. Same if i call it on onplayerconnect()

Where i have to put it?