Unable to print hash table iterator in powershell when hashtable is created from file

Question

I am trying to read a config file using PowerShell and then convert it to hashtable so that later I can retrieve the value by key.

Here is the code:

$installerConfigs = Get-Content $configFilePath | ConvertFrom-StringData
$installerConfigs
foreach ($h in $installerConfigs.GetEnumerator()) {
    Write-Host "$($h.Name): $($h.Value)"
}

While the content of the config file is

admin_username = 'administrator'
admin_password = '123456'

when I print the hashtable, it prints the value properly. But when I am iterating over it, it is unable to print anything.

Can someone point out what I am missing?

Just to mention, I have to use version 1.0 of PowerShell.