Some times cursor stuck and again start working and some time programmes not responding

Sub out the ram memory one at a time making sure there is one memory stick plugged in at all times. The piece that is left in your hand if this works is the problem.

You posted under Leviton 6124 programmable timer.
If this is not your timer, add a comment
Leviton 6124 manual:
http://waterheatertimer.org/images/6124-manual.pdf

If you have different timer, look at link below to help identify timer.
Leviton Timers:
http://waterheatertimer.org/Leviton-timers.html

Leviton 6124 timer instructions:
Timer comes with plastic protector over display >> remove protector to see display.
Large button is manual override.
After timer is wired, push override to make sure Load turns ON and OFF.

Timer has 3 small buttons located below manual override used for programming
Display is divided into 24-hours with am times on left and pm on right.
24 Hour day is divided into 1/2 Hour segments
Each 1/2 hour must be set for ON or OFF

Start by pushing left-side event-cursor-advance-button and it scrolls down each 1/2 Hour.
Once you arrive at 1/2 hour > make decision if you want timer ON or OFF for that half hour.

Press event-set-reset-button in center to set ON-OFF for that 1/2 hour.

Press center event-set-reset-button and solid black rectangle fills in for that half hour.
Solid black rectangle means timer ON for that 1/2 Hour.

Once solid square is selected, press event-cursor-advance-button and cursor advances again and starts filling in black rectangles for each 1/2 Hour period.
Keep filling in black rectangles for all times you want timer ON.

When you reach 1/2 Hour period you want timer OFF, then press center event-set-reset-button so that no black rectangle is visible for that 1/2 hour.
No black rectangle means timer is OFF for that half hour.

To set current time, use right-side time-advance-button.
Press and hold time-advance and time cursor advances down through the am and then pm hours.
Stop cursor at current time, and timer is ready.

dosent heat up or dry

Leviton 6124 timer instructions:
Timer comes with plastic protector over display >> remove protector to see display.
Large button is manual override.
After timer is wired, push override to make sure Load turns ON and OFF.

Timer has 3 small buttons located below manual override used for programming
Display is divided into 24-hours with am times on left and pm on right.
24 Hour day is divided into 1/2 Hour segments
Each 1/2 hour must be set for ON or OFF

Start by pushing left-side event-cursor-advance-button and it scrolls down each 1/2 Hour.
Once you arrive at 1/2 hour > make decision if you want timer ON or OFF for that half hour.

Press event-set-reset-button in center to set ON-OFF for that 1/2 hour.

Press center event-set-reset-button and solid black rectangle fills in for that half hour.
Solid black rectangle means timer ON for that 1/2 Hour.

Once solid square is selected, press event-cursor-advance-button and cursor advances again and starts filling in black rectangles for each 1/2 Hour period.
Keep filling in black rectangles for all times you want timer ON.

When you reach 1/2 Hour period you want timer OFF, then press center event-set-reset-button so that no black rectangle is visible for that 1/2 hour.
No black rectangle means timer is OFF for that half hour.

To set current time, use right-side time-advance-button.
Press and hold time-advance and time cursor advances down through the am and then pm hours.
Stop cursor at current time, and timer is ready.

please install ur touchpad driver again

I followed the advice of pressing the FN and F7 keys at the same time. It didn't work when the program was fully loaded, but I rebooted and tried again during the rebooting and it worked. I had the frozen cursor on the Travel Mate (Acer) also.

check the hard drive for any problems and re-install the drivers for the mouse

The issue may not necessarily be with the mouse. Are you able to use the keyboard once the mouse freezes? If you not even able to use the keyboard, there is some application installed on your computer or a virus due to which the mouse freezes. If, in case, the keyboard works even though the mouse is stuck, try changing the USB port or try a different mouse. Please revert back with any other observations. Good Luck