When memory card is plugged in xbox 360 doesn't sync with controller, when i switch off my memory card and restart xbox 360 everything is working fine......so it's memory card or xbox 360 console itself?
It could be either. Sounds like there's either a conflict with the memory card ports, or the memory card itself. If you can, borrow a memory card from a friend and try that. Another thing to try is taking your memory card to a friends house and see if it affects his 360 like it does yours. If not, then it's likely the card.
