running jobs on a distant machine

Hello

I have installed postgresql on a machine (lets call it A), in order to run jobs
In that machine all is right, i lunch pgadmin, install the service, and i could run the jobs
My problem is when i wanted to execute jobs in a distant machine, lets call it B
So I have installed pgadmin, install the service as : "c:/program files/pgadmin III/1.8/ pgAgent INSTALL pgAgent -u
user-p password hostaddr=127.0.0.1 dbname=postgres user=postgres" 
In the machine A which contains the base i created a job. This job is supposed to execute a script in the machine B.
So i put the path of this script in Defenition ("C:\test.bat"), and i Put the IP of the machine B in the field Host
Agent
But That did not work.
I am using 2 windows, No pb of connection since i can see and open the jobs database from the pgadmin of the machine B
I am using Pgadmin 1.8.4 In Machine A and 1.8.3 in B
Thank you for help