To see e-mails to open the pst file in outlook even though I backed new emails up a same pst file for using em client.

Hello
First of all, I am so sorry my english skill is so bad. but please help me. 
I imported pst file from outlook 2010 for using em client. I have backed my emails up the pst file. I opened the pst file in outlook 2010 but i cannot see new e-mails I backed up in em client program.
How can I see new emails that I backed up in em client ?
I wanna see e-mails to open the pst file in outlook even though I backed new emails up a same pst file for using em client. 

Hi Jinhyun, unfortunately eM Client does not support PST files, so if you’ve updated your local folders after you’ve imported the data into eM Client, these will not reflect in the PST file. PST files are a Microsoft format that you’re able to use only with Microsoft’ information.

Hope this helps,
Paul.