CC2630 ZNP: how to send InterPAN packet in specific channel question

Hi,

We want send InterPAN packet at specific channel.
In 802.15.4 MAC API.pdf 4.3.1.3, we can setting the parameter in macDataReq_t structures.

dataReq.TxOptions = MAC_TXOPTION_PWR_CHAN; //Use the power and channel values in macDataReq_t instead of the PIB values.
dataReq.Channel = 12;

We set the channel to 12, but InterPAN packet still send in other channel.

Does any suggestion about this question, or we can set channel by other method?

Thanks a lot.