Wallet open failed

Question

I have a oracle server installed in a machine and e oracle client on another machine. I have created a wallet using this commands

C:\Users\MRBULL93>mkstore -wrl C:\VideoWallet -create

C:\Users\MRBULL93>mkstore -wrl C:\VideoWallet -createCredential kejvidoko SYSTEM

also changed the sqlnet.ora file as follows

 # sqlnet.ora Network Configuration File: 
 C:\app\MRBULL93\product\11.2.0\client_1\network\admin\sqlnet.ora
 # Generated by Oracle configuration tools.

 # This file is actually generated by netca. But if customers choose to 
 # install "Software Only", this file wont exist and without the native 
 # authentication, they will not be able to connect to the database on NT.

 SQLNET.AUTHENTICATION_SERVICES= (NTS)

 NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)



 WALLET_LOCATION =
 (SOURCE =
     (METHOD=FILE)
     (METHOD_DATA =
     (DIRECTORY =C:\VideoWallet)
    )
    )

SQLNET.WALLET_OVERRIDE = TRUE

========================================================

I can modify the password using cmd and I can also open it with Wallet manager but when I call it

SQLPLUS /@kejvidoko I get the following message

ERROR: ORA-12578: TNS:wallet open failed

Can someone tell me how can i fix this .