I put low voltage light on incandescent dimmer,if something going to happen with it. It looks to be work fine. Or I should change to magnetic dimmer.

You should be using something like this Magnetic Low-Voltage Dimmer Switch White - Lutron MALV-600H-WH (http://www.google.com/products/catalog?hl=en&q=magnetic+dimmer&um=1&ie=UTF-8&cid=12297188195139306469&ei=uPgfTLHGNML68AbXzeS5DA&sa=X&oi=product_catalog_result&ct=result&resnum=2&ved=0CCcQ8wIwAQ#) What kind of bulb is in your light?

Mr 16 and I'm using diva dimmers

FWIW I used a low voltage halogen fixture with a regular dimmer for years and had no issues. It was a higher end 1000w dimmer.