Array usage

#!/bin/ksh
let i=0
set -A array
array{1}="qqqqqqqqqqqqqqqqqqq"

when run got error
t1[4]: array{1}=qqqqqqqqqqqqqqqqqqq: not found

Whats wrong here
Thanks in advance

The syntax is:

array[1]="qqqqqqqqqqqqqqq"

Thank you ! Appreciate it !