Error while loading shared libraries - Using CUnit on Netbeans

I am a newbie working with Cygwin and CUnit. I have to develop some Unit Tests using CUnit and Netbeans and I have followed the next tutorial:

http://ift.tt/1Ce13RY

At the end, when I was trying to run the first example test I got stocked by an error:

  0 [main] make 4380 C:\cygwin\bin\make.exe: *** fatal error - error while loading shared libraries: /cygdrive/C/Program Files/NetBeans 8.0.2/ide/bin/nativeexecution/Windows-x86_64/unbuffer.dll: cannot open shared object file: Exec format error

448 [main] make 4380 open_stackdumpfile: Dumping stack trace to make.exe.stackdump

I don't know if this has relation to the Cygwin version I have, I have a computer running Windows 7 Enterprise 64bits edition. I have configured my C project to use Cygwin 64bits edition...

Could you please share any idea about how I can solve this? Thanks!