calling an external function on a powershell script

Hello,

I have create this function on a ps script fc.ps1 :
function Write-EventLog
{
param([string]$msg = "Default Message", [string]$type="Information")
$log ="D:\Logs\test.log"
$time_beg=(get-date -uformat "%Y%m%d")+" "+(get-date -uformat "%H:%M:%S")
$user1=whoami
$buf=$time_beg + " par "+$user1 + ": Debut d'action => " + $msg
echo $buf |out-file $log -encoding "default" -append
}

When I try to execute this function on mains.ps1 with the command . d:\fc.ps1, no error returns but the output file isn't generated.

How can I resolve this problem?

Thanks

bibi