Cannot move current position of playing music

I have developed mp3 player app that I called it 'My MP3 Player".
I have added some features on my app but I just realized that I cannot move current position of playing music.
When I pause the current music and move current position of playing music to going forward or backward then after I click play button the position of playing music will be back to zero position (the beginning of playing music) as the following screenshots.

Any of you could solve this problem so I could move current position of playing music to forward or backward?
I attach the aia file of my app as reference.
My_Mp3_Player_v3_3 (1).aia (1019.8 KB)

Thanks
Asri

this extension may help you.

Thanks.
I will explore it to know this extension could solve my issue or not.

Thanks.
I am checking them.