script execution omits commands - powershell

Question

I have a small script to get information about a network computer in my domain but during the execution the script omits two lines.
$HostName = Read-Host 'Veuillez donner le nom du poste que vous voulez verifier?'
If (Test-Connection $HostName -count 4 -quiet)
{
Write 'The host responded';
gwmi win32_volume -ComputerName $HostName -Filter 'drivetype = 3' | select driveletter, label, #{LABEL='GBfreespace';EXPRESSION={"{0:N2}" -f ($_.freespace/1GB)} };
Get-WmiObject Win32_OperatingSystem -ComputerName $HostName | Select-Object PSComputerName, Description, OSArchitecture;
Get-ADComputer $HostName | select DistinguishedName;
Get-WmiObject -Class Win32_Product -Computer $HostName | Format-Table -Property Name, Version, InstallDate, Vendor;
}
else
{
Write 'The host doesn''t responded';
}
The problem does not seems to be in the commands (I get the desired result by typing them directly in the console), but in the position of the command.
I tried to invert the order of the commands and the result was always like this:
After the if statement:
the two first commands are displayed
the 3rd and the 4th are omitted
the last one is again displayed
I also tried it like this:
If (Test-Connection $HostName -count 4 -quiet)
{
Get-WmiObject Win32_OperatingSystem -ComputerName $HostName | Select-Object PSComputerName, Description, OSArchitecture;
Get-ADComputer $HostName | select DistinguishedName;
Get-ADComputer $HostName | select DistinguishedName;
Get-WmiObject Win32_OperatingSystem -ComputerName $HostName | Select-Object PSComputerName, Description, OSArchitecture;
Get-ADComputer $HostName | select DistinguishedName;
Write 'The host responded';
gwmi win32_volume -ComputerName $HostName -Filter 'drivetype = 3' | select driveletter, label, #{LABEL='GBfreespace';EXPRESSION={"{0:N2}" -f ($_.freespace/1GB)} };
Get-WmiObject -Class Win32_Product -Computer $HostName | Format-Table -Property Name, Version, InstallDate, Vendor;
}
After the if statement:
the command 1 is displayed
the commands 2 and 3 are omitted
the 4th command is displayed
the 5th command is again omitted
the 6th is displayed
the 7th is omitted and finally the 8th is displayed