Problem with app demo proximity for a single beacon

hello all
i use estimote android app demo for proximity for a single beacon, but my beacon is not detected I don’t know where is the problem , plaise help me
thank’s
05-31 10:54:09.791 29195-29206/com.estimote.proximitycontent D/ScanRecord: parseFromBytes
05-31 10:54:09.801 29195-29489/com.estimote.proximitycontent D/ScanRecord: parseFromBytes
05-31 10:54:09.801 29195-29650/com.estimote.proximitycontent D/ScanRecord: parseFromBytes
05-31 10:54:09.801 29195-29650/com.estimote.proximitycontent D/ScanRecord: parseFromBytes