mkl_freeBuffer() access violation exception error

hi 

i use mkl c++ compiler 11.0.066 and mkl10.1 and c++/clr vs2008

i use fft and conv function from mkl in multi thread realtime application (each thread exec fft and conv parallel)

but after little time usage memory go up and application crash.

with any leak detector i cant find any leakage in my code .

recently i study mkl help and find i must use mkl_FreeBuffer() after mkl function for avoidance memory leakage

but when i call mkl_freeBuffer Application crash with access violation exception.

what shoud i do?

i use 64 bit mkl

 additional library directory  -> em64t\lib 

additional dependecy -> mkl_intel_lp64_dll.lib   ;    mkl_intel_thread_dll.lib     ;  mkl_core_dll.lib

thanks for you.