I replaced the heating element in my dryer along with the thermal fuse, the cycling thermostat, and the fixed thermostat. But I am not getting any heat. What else could the problem be? Please help me

Here is your wiring diagram
https://www.servicematters.com/d...0Sheet%20-%208528187.pdf

Note that there are two thermal fuses in this unit one in the motor circuit and one in the heater circuit.

As Kayakcrzy said you may not be getting 240 volts to the unit. Often half the line can drop out without actually tripping the breaker.
Turn the breaker off/on slowly a couple times.

If all the above is OK then all that is left is the centrifugal switch on the motor and one set of contacts in the timer.

One way to check for 240 is put the unit into timed dry and see if it advances. The timer on this units runs on 240.