Hi Lenard,
two things come to my mind:
1. did you open the necessary ports? (see chapter 9.2.2. of Getting Started with AS ABAP 7.4 SP5 incl. BW on SAP HANA SP7 [Developer Edition] and in CAL on the "Virtual Machine" tab for your instance).
2. Maybe you're behind a firewall and/or something is blocking the access to the port.
Cheers,
Jasmin