Yes to all questions:

pgrep fop2_server

6153

netstat -lnp | grep 4445

tcp 0 0 0.0.0.0:4445 0.0.0.0:* LISTEN 6153/fop2_serve

{asterisk]# telnet 10.80.129.122 4445
Trying 10.80.129.122...
Connected to 10.80.129.122 (10.80.129.122).
Escape character is '^]'.

I am in the same LAN.
About flash, i have version 9.0.100.0 installed.

my buttons.cfg file is (i don't have voice mail here, so i removed that lines):
[SIP/22784]
type=extension
extension=22784
context=sip
label=Nicolas

My test extension in asterisk is like this:
[22784]
callerid=Rui Mota <22784>
accountcode=730183001
username=Rui_Mota
secret=rjmota
context=sip
type=friend
host=dynamic

I am having the same problem of not logging in...

Fop2 in installed on a different machine from asterisk.
I think the connection to the server is working since if i start it with fop2_server -X 3 (as i saw somewhere in the forum), i can see all the actions going on in asterisk.

When i run fop2_server --test:
Flash Operator Panel 2 - No valid license found. Demo Mode
Connection to manager OK!

However, when i try to login to fop2, i just stays saying "Connecting to server, attempt number : 1"...

I suppose the problem may be in the users config in fop2.cfg. I have it like this:

; USER LIST
user=22784:password:dial,transfer,spy,whisper,hangup,pickup,record

This is an actual extension configured in sip.conf, and its password.
Is this the info supposed to config here?
Is it needed to configure any kind of context in fop2.cfg?
Do you have any other idea?