ACtive Directory OUs users Import

Dear Experts,

Thanks in Advance. I found this script on Internet and tried to import Bulk users to AD and it was successful. The issue is when the user tried to login password is not accepting. Its not possible to reset all users password manually. Kindly let me know what to do.

###########################################################
# AUTHOR  : Kelly Bush
# DATE    : 1/16/2014  
# COMMENT : Creates Active Directory users and populates
#           different attributes based on import_users.csv
# Based on: PowerShell: Create Active Directory Users Based On Excel Input
###########################################################
Import-Module ActiveDirectory
$path     = Split-Path -parent $MyInvocation.MyCommand.Definition
$newpath  = $path + "\import_users.csv"
# Define variables
$log      = $path + "\created_ActiveDirectory_users.log"
$date     = Get-Date
$i        = 0

Function createActiveDirectoryUsers
{

"Created the following Active Directory users (on " + $date + "): " | Out-File $log -append
"--------------------------------------------" | Out-File $log -append

  Import-CSV $newpath | ForEach-Object {
    $samAccount = $_.SamAccountName
    Try   { $exists = Get-ADUser -LDAPFilter "(sAMAccountName=$samAccount)" }
    Catch { }
    If(!$exists)
    {
      $i++
      # Set all variables according to the table names in the Excel
      # sheet / import CSV. The names can differ in every project, but
      # if the names change, make sure to change it below as well.
      $setpass = ConvertTo-SecureString -AsPlainText $_.Password -force
      New-ADUser -Name $_.DisplayName -SamAccountName $_.SamAccountName -GivenName $_.GivenName -Initials $_.Initials `
      -Surname $_.SN -DisplayName $_.DisplayName -Office $_.OfficeName `
      -Description $_.Description -EmailAddress $_.eMail `
      -StreetAddress $_.StreetAddress -City $_.L `
      -PostalCode $_.PostalCode -Country $_.CO -UserPrincipalName $_.UPN `
      -Company $_.Company -Department $_.Department -EmployeeID $_.ID `
      -OfficePhone $_.Phone -AccountPassword $setpass -Enabled $true -Path $_.OU  
 
      $output  = $i.ToString() + ") Name: " + $_.CN + "  sAMAccountName: " 
      $output += $sam + "  Pass: " + $_.Password
      $output | Out-File $log -append
    }
    Else
    {
      "SKIPPED - USER ALREADY EXISTS OR ERROR: " + $_.CN | Out-File $log -append
    }
  }
  "----------------------------------------" + "`n" | Out-File $log -append
}
# Run function
createActiveDirectoryUsers
#End Script