Copy Script Trouble - copy

Question

I've created a script that I found in other forums to copy a file from one server to another. A bit of background here. We have large PDF files being generated nightly and saved on a share at one site that need to be copied over to our corporate share. These files are pretty sizable (anywhere between 25MB to as high as 65MB), so I can only copy these files off hours. The source repository holds all the original files from the year, so I only want to copy the most recent files. I created a script (or tried to at least) that copies only the most recent files from the SourceHost location to CorpHost share and set up a Task Schedule to run at 7:30pm.
The script kicks off and runs as scheduled, but nothing gets copied over. I don't see any errors being generated from the task schedule and it appears to run as normal as the script returns a "not copying .pdf". Originally, I though that maybe it was bypassing all the files because the generation date is outside the $Max_days range (-1), so I increased it to -2. No luck. Increased it again to -5 - no luck. -10... nothing.
Here's the code sample:
$RemotePath = "\\<CorpHost>\Shared\Packing_Slips\<Site>"
$SourcePath = "\\<SourceHost>\<Site>_packingslips"
$Max_days = "-1"
$Curr_date = Get-Date
#Checking date and then copying file from RemotePath to LocalPath
foreach ($file in (Get-ChildItem $SourcePath))
{
if ($file.LastWriteTime -gt ($Curr_date).AddDays($Max_days))
{
Copy-Item -Path $file.FullName -Destination $RemotePath
}
else
{
"not copying $file"
}
}