ok thank you very much, I'll try those things. I am using the same thread on top and bottom, and I have a new needle.
I will try to change the fabric part on the machine and re- thread the machine..... and I will let you know :D
Mostly the problem that I'm having is the top thread is pulling through and instead of locking inside the fabric, its on the back of the fabric :cry: and that is why I frustrated..... :cry:
But after lunch I'll try everything you suggested :D
Thank you again :D