type ls -al
You should see similiar the following:
-rwxr-xr-x 1 root root 300685722 Mar 12 2009 WCS-STANDARD-K9-6.0.58.0.bin (your version here)
The 1st rwx is user read/write/execute, the next, r-x is group read & execute & and the last r-x is world (everyone) read & execute
If not, you can simply type chmod u+x WCS-STANDARD-K9-6.0.58.0.bin and possibly g+x WCS-STANDARD-K9-6.0.58.0.bin to give executable access to the file.
If you are in the same directory, add a ./ before the name of the file(no spaces)