Needle string wont stay connected

Sounds like your tension is set too tight for the thread. Or you are using a poor quality thread that unravels and keeps knotting as it comes through the needle. Or you have a block between your tension discs. Pull a thicker thread through the discs to clear anything that is there.

Please check your needle position, putting it in backwards is a very common error, the FLAT side of the needle shank should be towards the back. Also be sure that during the transition, that the bobbin thread did not get misaligned.
So, make sure the needle has the flat side to the back, and rethread your bobbin thread through making sure it is correct.

try changing the needle--make sure to use every thread guide
try a different thread
check for any burrs on the needle plate or on the bobbin case
clean under the needle plate & in the bobbin area for lint or loose
threads

try using a longer thread tail of 4 to 6 inches, that what I do & my
needles never come unthreaded

have thread tails of 4 to 6 inches long & pull the thread back behind the needle before you start sewing

most sewing machines the needle goes in flat side to the back of the machine,
if it continues to break needle the it could be out of time & needs to be serviced

Type in sewing machine problems on 'youtube'. There are lots of demo's inc. a great chap in his 50's. Explains thoroughly what's happening. Free manuals as pdf if you GOOGLE for lots of machines.

Try loosening the tension and pulling a longer string of thread. Also, if the needle is not at the highest point, when you start sewing, the thread will pull out.

It may be that your presser foot is not alligned with the cutter. This is the problem that I am trying to solve now. My presser foot is not lining up with the blade and it does what yours do. ok then nothing.I have changed the needles and cleaned it and oiled it. I have taken apart the foot and assembled it and when I put it back on it wont allign to the blade and the book is NO HELP at all. I won't pay for an answer but when i get it i'll lpass it on to you. OK.

Try changing the needle it might be dull