Issue in Executing a batch script during -XX:OnOutOfMemoryError event - powershell

Question

I have written a power shell script in my Win 2008 server, to execute the below mentioned 4 steps whenever an OutOfMemoryError occurs in the system.
Email users that the applications is going to be restarted.
stop the app service
clear cache and tmp files
start the service
email users that the service is started
The Script is given below and it is working like a gem when executed manually. I have added the below .ps1 script in a .bat file and updated the registry entry as
-server -Xms1024m -Xmx1536m -XX:MaxPermSize=256m -XX:+UseParallelOldGC -XX:OnOutOfMemoryError="D:\Support\UWD_OOM_restart.bat"
Issue: Whenever an OOM error occurs, the batch script invokes the power shell script, but only the first 3 steps are getting executed automatically. The last 2 steps( starting the service and emailing end users are not getting executed automatically). Need some assistance in this case
Power shell script:
$hostname = 'XXXXXX'
$smtpServer = 'xxxxxxxx'
$from = "xxxxxxxx#xxxxxxxx.com"
$recipients = 'xxxxxxxx#xxxxxxxx.com'
$Subject = "Restarting Apps - UWD Service on $hostname due to Java OUT OF MEMORY ERROR"
$body = "This is an automated message to confirm that the UWD service on xxxxxxxx server is about to be restarted, as the application has encountered Java out of memory error and went to unresponsive state. Kindly ignore any alerts for the next 10 minutes from this service."
Send-MailMessage -To $recipients -Subject $Subject -Body $body -From $from -SmtpServer $smtpServer
# Stop service
$service = 'xxxxxxxx"
Stop-Service -name $service -Verbose
do {
Start-sleep -s 5
}
until ((get-service $service).Status -eq 'Stopped')
# Folder delete
rm -r -fo 'D:\xxxxxxx\cache'
rm -r -fo 'D:\xxxxxxx\tmp'
# Start service
start-Service -name $service -Verbose
do {
Start-sleep -s 5
}
until ((get-service $service).Status -eq 'Running')
# Send confirmation that service has restarted successfully
$Subject = "UWD Service Restarted Successfully on $hostname"
$body = "This mail confirms that the UWD application service on $hostname is now running.
Application Team, Kindly smoke test your application and inform xxxxxx for any issues."
Start-Sleep -s 5
Send-MailMessage -To $recipients -Subject $Subject -Body $body -From $from -SmtpServer $smtpServer