Dump Analysis issue

I tried to catch the stack trace of an address, but it always show me nothing,

my issue is analyse memory leak, so i have queried all heap statics and then queried highest allocated memory, it returned me lot of allocation,

and i tried to search many of allocation address by “!heap -p –a ####“, #### is adress. but it never return me any call stack,

but if I search this address/any other adresses in memory, it shows me similar allocation.

also if i try to run this command “dt ntdll!_DPH_HEAP_BLOCK StackTrace ####,” , it return me NULL stack trace.

is it because of page heap for application is not enabled????