I already tried this link (How to add *.a files into repository using svnX?)
but didn't find *.a file on my working copy folder in svnx
my svnx version 2.0b2 (https://subversion.assembla.com/svn/svnx/html/index.html)
.a file is third party library. therefore I can not modify file extention as bypass I was commit use by eclipse pluggin subversive. but this solution is not convinience.