I forgot to create a Value called sample
 Code:
KiXtart version is: 4.53
KiXtart executable name is: KIX32.EXE
User privilege by PRIV macro: ADMIN
Reading Key ERROR: 0 - The operation completed successfully.
Value read from HKLM\SOFTWARE\TEST_KIX was: aaa
Saving Key ERROR: 0 - The operation completed successfully.
Loading Key ERROR: 5 - Access is denied.