Juki 5555 ok its picking up the thread now, but it is not sewing stitches. and it won't cut the top thread, seems to only cut the bottom thread...

Question edited for clarity.

Back to basics. Unthread the machine. Remove the bobbin and make sure is is correctly located and lock. Re-thread the top end. Make sure the thread is through the eye of the needle and has a long tail.

https://www.google.com/search?q=Juki+Dnu-241h+not+stitching

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Bird nest. Remove the top thread from the machine. ALWAYS RAISE the presser foot and rethread.

it appears the basically the needle thread tension is not set right
try increasing the tension of that thread
next check the needle /hook timing

Make sure you are threaded correctly. Also be sure that your bobbin is sitting in the casing correctly. If the timing is right and the hook is catching, the thread may not be pulling through correctly. Clean your machine as well. Make sure your tension spring is clean and doesn't need to be tuned up.

whether its bias or straight does not matter to machine. loosen the bobbin tension and put more tension on take up spring by inserting a screwdriver in the slot of the top thread tensioner. turn to right.

try adjusting the top thread tension and see if that helps
also try changing the thread.
also change the needle--make sure it's the right needle for the fabric
being sewed.

Are you absolutley sure you're not getting a problem with stitch formation on, for example, wide zig-zag. Check again, using a different colour top and bottom and make sure that the stitch is being formed properly with only the top colour on top and bottom colour on the bottom. It sounds as though the bottom loop is not being picked-up by the hook properly. Make sure you've thoroughly cleaned-out any fluff under the stitch-plate and remove the hook/shuttle and give the hook race a good clean and give it a single drop of oil, even if you've got the lightweight part-plastic hook/shuttle fitted.

put your thread on there right place, and adjust your tension.and change your needle.

It is possible that you have the bobbin in backwards. Try inserting the bobbin so that the thread pulls in the opposite direction than it currently does. Also, sometimes you have to really push the bobbin case in to make sure it snaps into place. Other than that, you may have a dull needle...try replacing it, or it just may need an overhaul.

What bobbins do I use on a Juki DDL-8300