need help

[raiden0899]

im working on a money system and i'm trying to figure out how to change the value of the money variables. heres a part of the script:

NPC Code:

---

if (keypressed) {

  if (strequals(#p(1),n)) {

    setstring client.dollars,strtofloat(client.dollars)+=1;

  }

}

---

when i press n, it changes dollars to "strtofloat(client.dollars)+=1" instead of raising it by 1. can someone tell me what i'm doing wrong?