I have build an .exe application from simulinnk model .slx file. When I try to run the .exe application it says some .dll file is missing??

it shows an error that "tamutil.dll" is missing. I have downloaded and tried to place it in "MatlabR2013a\bin\win64" and run the application again again it's showing the same error. I tried also placing the tamutil.dll files in the folder where the application is but it too didn't work. hoping for help n thnx in advance !!