why not found adb?

Selected model: I8552
Selected port: COM8 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info…
PDA/CSC version: I8552XXANF2/I8552OJVANF1
Phone version: SW VERSION :None
Phone HW: MP 0.800
Cal date: 2013.05.21
Reading IMEI… OK
IMEI: 355882059975278
Phone S/N: RV1D72A124
Build: 8X25Q-QSOSKOLYM-3030
Done with Samsung Tool v.18.6

Selected model: I8552
Selected port: COM8 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Reading phone info…
PDA/CSC version: I8552XXANF2/I8552OJVANF1
Phone version: SW VERSION :None
Phone HW: MP 0.800
Cal date: 2013.05.21
Searching ADB device…
Phone not found
Done with Samsung Tool v.18.6