Integration Services :: Execute Process Task / Passing In Variables From SSIS To Powershell Script

I am using SSIS 2012 to dynamically backup stored procedures on a list of Servers and Databases.Here are the steps in my package,

1. Execute SQL Task: Captures a result set (configured to save the data set in an Object variable) with all the Servers and Databases on which stored procedures exist.

2. For each loop that is configured to get each each row(server name @[User::Server_Name] and databases name @[User::DataBase_Name]) from the object variable (@[User::Connection_Strings])and pass it to a connection manager that has an expression for servername
and database name.

2a)  Within the for each loop, i have an execute process task that is configured as

 i) Executable:  C:WindowsSystem32WindowsPowerShellv1.0powershell.exe
 ii) Arguments:  Configured this to fetch value from an expression. The expression i am using is,'C:batch - CopyPowerShell Scripts to Backup Stored ProceduresScriptOutSPs.ps1' -$Server_Name "+ @[User::Server_Name]+ " -$Database_Name "+ @[User::DataBase_Name]
             
Note:  @[User::Server_Name] is the Servername from object variable and so is @[User::DataBase_Name] for database name . The execute task is to run a command line that triggers a powershell script with parameters. Here is the powershell script that i am using,

param([String]$Server_Name,[String]$Database_Name)
$Server = $Server_Name
$Database = $Database_Name
$savePath = "SalesDepartmentsData ScienceUsersSANDEEP PStoredProcedures_Backup"

[code]...

When i execute the script, by passing parameters from arguments, it executes successfully but nothing happens. Passing wrong arguments in the expression?