Changed Timing Belt, Now car won't fire.

Recently changed the timing belt. Now the engine has not compression. Won't even try to turn over. Just spins. Can someone suggest how to fix this problem? Or what may be causing it.

too easy, you put the belt on with the cams in the wrong position allowing air straight out of the open valves.

You failed to set the motor to Top Dead Center (TDC) before you began working, then you turned the motor after you had the sprockets off, now the pistons are going up while the valves are open, and there's no compression.

You have to take the belt off again, and the valve cover, and set the crank so the #1 piston is at the top on the compression stroke, and set the valve train so the #1 valves are both closed. The valve train and the crank have a key on them, and the sprockets have marks on them. When you crank and valves aligned on TDC, the marks on the sprockets should form a straight line that includes the center of the respective shaft they are mounted to.

You are very lucky the motor is a non-interference type, or the pistons would have slammed into the valves by now, and you would be facing very expensive repairs.