Stumped on this one, Need ideas please

Below is the code for Airspeed gauge. It is non linear hence the reason for 2 different ranges. It stops at 250knots and never updates above 250 0 to 250 it works greta and is dead on accurate. What am I missing here? hope it is something simple
Thanks,
Rob

Code:

---

Var 1000, name IASservo

Var 1001, name IASREAL

Var 3301, name IAS, Link IOCP, Offset 3301    // Pilot airspped in Knots
{
  &IASREAL = &IAS / 10000
  IF &IASREAL < 60
  {
    &IASservo = 10   
  }
  IF &IASREAL > 60
  {
    IF &IASREAL < 252
    {
      CALL &IAS250
    }
  }
  ELSE
  {
    IF &IASREAL > 252
    {
      CALL &IAS300
    }
  }
}

Var 1002, name IAS250, Link SUBRUTINE
{
  L0 = &IASREAL * 16.617
  L1 = L0 - 1054.36
  &IASservo = L1   
}

Var 1003, name IAS300, Link SUBRUTINE
{
  L0 = &IASREAL * 7
  L1 = L0 + 1350
  &IASservo = L1   
}

---

Figured it out