Could anyone explain this to me, please.
What could be the reason?
Most people get meterpreter session at this stage.

Interface: Armitage.
Options: All defaults.

Both computers have xp installed on them. I even have disabled firewall on them.

1) Finding exploits (via db_autopwn) Found 102 exploits Found 101 exploits

2)Sorting Exploits
3) Launching Exploits
4) Listing sessions
msf > sessions -v

Active sesstions

No active sessions.