Phone rebooting while accessing gallery

[AC Question]

Hi Friends I am facing a problem after installing a custom rom on my device.
The phone is rebooting while trying to access Gallery,Video player,xender and whatsapp (while opening image or video) also.
I tried the following but it not helped.
reinstalled the rom, factory data reset ,wipe cache,dalwik cache etc
formatted phone memory and sd card
used alternative apps too...
Please help me to solve the problem.I am ready to do anything to solve it..please replay .....
Thanks in advance