SQL Server 2008 :: Powershell Script To Move Backup Files

I am trying to create a job using power-shell script to move the backup files from one folder to another. I am using Ola Hallengren script for backups. Ola hallengren created a common backup folder with sub-folders for databases and even more sub folders for Full and Log backups. My goal is to move full backups, which are older than a month and save them in a different drive along with the same folder structure. I was able to move the first set of backups without any problem, but I can't move anymore files and keep getting this error even when I try to overwrite the previous file with the force statement:

Move-Item : Cannot create a file when that file already exists.

At line:5 char:9
+ Move-Item $i.FullName C:Test -force
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : WriteError: (C:BackupVALIDATIONgcommon:DirectoryInfo) [Move-Item], I
+ FullyQualifiedErrorId : MoveDirectoryItemIOError,Microsoft.PowerShell.Commands.MoveItemCommand

Here's the script that I used to move the first set of files:

foreach ($i in Get-ChildItem C:BackupVALIDATION)
{
if ($i.CreationTime -lt ($(Get-Date).AddMonths(-1)))
{
Move-Item $i.FullName C:Test
}
}