Firmware 10c0 xbee pro sleep mode

I have an RS232 module , sleep mode is 0. If I use the AT commands I can confirm it is 0 with atsm (that returns 0) and can set it to 0 with atsm0 (that returns OK), no problems there then. If I go to API and send the packet

7E 00 04 08 52 53 4D 05

it returns

This is not correct, there should only be one 0x00 before the checksum in the response. If I now set SM to 0 in the same way with 7E 00 05 08 52 53 4D 30 05 I get no response, asking it again what the sleep mode is it returns

which again is wrong.

Message was edited by: Mjolinor