Sigfox_CLI_Demo_Project command values for start_continuous_transmission

I am trying to trigger the start_continuous_transmission for the sigfox CLI demo but it returns an error 0x0058 when I debug. What are the values to trigger it ? I tried editing the code to fit in the frequency manually but it still returns an error.

void SIGFOX_API_start_continuous_transmission_Action(void)
{
 sfx_u32 frequency=(uint32_t)920800000; //(uint32_t)unsignedCommandArgument(0);
 sfx_modulation_type_t mode=(sfx_modulation_type_t)0; 
 //unsignedCommandArgument(1); 
//0 for unmodulated 
 sfx_error_t err;
 
 err=SIGFOX_API_start_continuous_transmission(frequency, mode);
 
 responsePrintf("{&N API call...&tx}\r\n",
		 "SIGFOX_API_start_continuous_transmission", "sfx_error", err);
}

I couldn't find the parameters in the documentation or code. Please help.

Thank you

Best regards,

Chong