I've looked up your details on the armory. You're playing a lvl 60-something team of Tauren shamans, right? There's two things that you need to check. Do you have a grey kodo as your mount? If not, then change the name of the mount to the correct one. Are you trying to use the macro in the outlands? If so, this macro will try to use the flying mount, which you probably don't have. Try changing the macro to this:

#showtooltip
/stopmacro [flying]
/cast [combat,nomounted][modifier] Ghost Wolf
/cast [nostance,nocombat] <name of your mount>
/dismount [mounted]
/cancelform [stance]

And replace <name of your mount> with the actual name of your mount.