Hello Rocky,
First of all if it is missing stitches on silky, stretchy synthetic material you would be best using an anti static needle, or, you can put a toilet roll on your lap and feed the toilet roll on top of the fabric then peel it off, if the machine is missing stitches on cotton fabric as well then you may need to retime the machine, if it sews okay on cotton fabric then it is a needle problem, if you type my address as you say it and not as you see it I can attach instructions if you email.
Ken
kendourof at yahoo dot com
October 2010