Sir I am owning a Janome Memory Craft 10001 but recently it's not working properly in ordinary sewing mode the top side of the fabric the stitch looks okay but underneath it is loose and while embroidering the thread gets stuck in the hook race, I tried cleaning the bobbin, bobbin holder, changed the needle but nothing seems to work. kindly help my email ID is [email protected]

Question edited for clarity.
Please don't type in all CAPS, it is considered SHOUTING and is harder to read.

Sewing machine tension is a delicate tug of war between the bottom Bobbin tension and the Upper tension to put the loop between the 2 layers of fabric. You set the Bobbin tension first and the the top tension depends on the fabric and the thread used.

Your Bobbin tension is very very loose to be not tensioning at all or the top tension is too loose.

Adjusting The Tension - Janome Memory Craft 6500 ...

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Janome Memory Craft 6500 Professional Manual Online: balancing thread tension, Adjusting The Tension. Correct Tension: The Ideal Straight Stitch Has Threads ...

Best video on tension

Try to tighten the top thread tension. Make sure the thread is going through the tension disc.

When selecting a stich, there's a button with a triangle with one edge pointing down. There you can select Needle Position and Stitch Length. --PDF manual, page 23

The thread tension has no influence on the stitch length. It just adjusts, where needle thread and bobbin thread 'meet' inside the fabric. A too high tension means, the bobbin thread is pulled trough the fabric and can be seen on the upper (needle) side. A too low tension means, the bobbin thread is not pulled through the fabric and you can see the needle thread on the bobbin side.

Top stitching is usually done with straight stitch, ie stitch width on zero and stitch length on 2.5 but it depends on the application and the effect you are trying to get. Normal top stitch is where you might be stitching a facing down on the outside of a neckline, so you might want to stitch about 5mm away from the edge of the fabric. Always stitch from the outside of the garment, the finished side so you can turn on corners and control the fabric. If you have a clear pressure foot, then this will make watching the stitching easier. Not sure what your problem is with this technique so feel free to add more in comments if I've missed something.

Check your manual and look for the key words (Bobbin Tension). You can adjust the bobbin thread as well as the top thread.

Take it to a Janome dealer for repair.

Try changing the needle sometimes over use causes burrs on the end of a needle and always remember to use proper needles to appropriate fabrics. Change needles frequently to avoid unnecessary wear on the feed dog teeth

See if you can run the program in compatibility mode, with win 2000 or xp.

Are you checking the simple things such as making sure you have the presser foot up when you thread and the tensions set between 4 and 6, bobbin in the correct way round and tension enough to pull the thread through with some resistence.

Manual for Janome 9000 is available from the Janome site. http://www.janome.com/documents/File/ManualFile/inst%20book%20MC9000.pdf