ISO 8583 message numeric in byte

Question

Config:

<template type="0200">
        <field num="3" type="NUMERIC" length="6">000000</field>
        <field num="11" type="NUMERIC" length="6" />
        <field num="24" type="NUMERIC" length="3" />
</template>

Code:

mfact.setTraceNumberGenerator(new SimpleTraceGenerator((int) (System
                    .currentTimeMillis() % 100000)));
m = mfact.newMessage(0x200);
m.setBinary(false);

m.setValue(24, 109, IsoType.NUMERIC, 3);
String strMsg = new String(msg.writeData());

I get the following result for strMsg

05002020010000000000920000058121109

Please look at the last 3 number.

The result should be:

050020200100000000009200000581210109

Why is the field 24 is 109, I thought it should be 0109?