You can use simpler query I guess,
SELECT *
FROM STS_VEHICLE_RUNNING_STATUS
WHERE
CONVERT(VARCHAR(10), VRS_UTCTIME ,101) >= CONVERT(VARCHAR(10) ,@YourDate,101)
AND CONVERT(VARCHAR(10) ,VRS_UTCTIME ,101) <= CONVERT(VARCHAR(10) ,@YourDate,101)
AND VRS_DEVICEID='ST0001'
This should include the dates.
Milind