How to resolve Error executing aapt in Android/Eclipse?

Error executing aapt.

Please check aapt is present at /home/padmakumar/android-sdk/platform-tools/aapt    NhpAndroid_tablet_k4        line 1  Android ADT Problem
 
 Hint: On 64-bit systems, 
 make sure the 32-bit libraries are installed: sudo apt-get install ia32-libs    
         line 1  Android ADT Problem
 

I can delete 2 errors in problem tab for temp solution or cleaning the projects or deleting the gen/bin folder and recreating or restarting works fine for temporary.

how to resolve permanently to aviod this problem? any help?

Note: I executed this command 'sudo apt-get install ia32-libs' still its asking.

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