Display Pet Tooltip Macro Help

I want to have a macro that will summon a pet based on the mod key.
The issue is that the macro only shows the question mark instead of displaying the pet tooltip.

Here is the macro;

#showtooltip [mod:ctrl]Argent Gruntling;[mod:alt]Lil’ Ragnaros;Lil’ XT
/summonpet [mod:ctrl]Argent Gruntling;[mod:alt]Lil’ Ragnaros;Lil’ XT

This used to work displaying the correct tooltip for the mod yet it stopped working in SL.

Is there a way to get this working again?