Mail Monitor - lan connection

Two computers connected in LAN. One is direct connected with net - Mail Monitor is working OK.
Problem is with my other computer which is connected via LAN to the first. - Impossible to connect to the server (10049)
Same settings on both computers but other not working.
what is the problem?

How the second computer go to internet? Is this proxy installed on the first computer or something else?

?

Is this proxy installed

?
For second computer I set IP address, workgroup and internet work.
First computer go through wireless network connection D-Link AirPlus.
I hope I answered.

Do you use any mail client? Outlook, Thunterbird or other? What is your mail server? Please try to ping your mail server.

ping smtp.gmail.com / ping pop.gmail.com
in both cases OK:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Outlook working OK.

Please check the account settings in the Mail Monitor. See attached screenshot.

I set - nothing!
Win7 x64?

I set - nothing!

Sorry, do you have the same settings? Is the server port the 995?

see

Hmm... try to increase the timeout value.

There is no error by the way. Instead of opening a mail with the selected file attached, nothing happens.