Did you directly download the linux_glibc22.tgz binary package and then untar it locally, or use wget to fetch the files separately? In the first case, I find that the files you mention are marked as "-rwxr-xr-x" when I untar them here. In the second case, I've sometimes seen wget turn off the executable bit in downloaded files, and I don't know how to fix that problem. This is one reason I'm no longer enamored with wget. You could try to adapt the UPDATER script for your purposes:
http://afni.nimh.nih.gov/afni/download/via_updater