Send sms to short number

i use smstools3 as smsgate. How can i send message to short number?

for sending to shot number via SMSTOOLS3 need use prefix “s”…
If in Compose message i write number with prefix “s” PlaySMS remove this prefix and there will error…
Is there any PlaySMS config option for disable remove my prefix at destination number?

Bump, anybody knows how to send sms to short number?