How do you launch and what kind of tires?
Have you tried... foot completely on the gas.. then mashing the gas? if that doesn't get your tires to spin with the automatic something's wrong.. if you roll into it weight shifts and it won't spin
Have you ever tried powerbraking, to, say, 1800-2k RPMs to get the engine speed up some before launching?
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2003 Regal GS - the beater/daily driver - somewhat stock (yeah right). No its not a mustang, at least it's blown.
2001 GT Black on Black 5 speed
MM Strut Tower Brace/Weld-In Subframe Connectors/Koni Springs&Adjustables/Cobra Brakes/Cobra Rack/Tri-Ax/3.73s/SCT Tuner 56k miles