After doing additional tests with (voip.freephoneline.ca), calling the same phone number three time in a row, calls disconnects at 32 seconds. If i call the same number a fourth time, my outbound call is correct. No disconnection at 32 seconds.
If i call a different number, i have to do the same pattern.
(2013-04-27): PROBLEM FIXED!
Problem solved when FPL Windows Desktop v3.2.6 connect to: voip2.freephoneline.ca
You have to add two entries in the "hosts" file located at C:\Windows\System32\Drivers\etc
208.xx.xxx.165 voip2.freephoneline.ca
208.xx.xxx.165 voip.freephoneline.ca
Since moderator do not want us to post "public" IP

(mod, you know what mean public?), you have to find it by your own.
How to find an IP from a hostname?
1. If you are using Windows, open a command prompt and type: nslookup voip2.freephoneline.ca
OR
2. go to this website
hostname lookup