You may have to remove the new belts and clean the pulleys.  Kicks and Trackers have troubles with the poor design of their serpinteine belt routing.  This is why new cars have the extra long snaking belts that wrap 180 deg+ of each pulley with idlers and spring loaded tensioners, not just the 120 deg. or so like on the Kick.   The Kicks is done off of the old V-belt design.  This is only marginally sucessful with a flat pulley.  ÂÂ
Quote from TN Tracker off of another board on the slipping NEW belt issue:
"I had this problem myself once. Tried everything I could think of including belt dressing spray. Out of desperation I took a product called "Goof-Off" and some steel wool to the pulleys. Installed a new belt and things were quiet from then on. Seems the slipping belt had formed a glaze on the pulleys and installing a new belt without cleaning the pulleys was useless."
Goof off, Denatured Alcohol, or any other non petroleum based cleaning solvent should do the trick on cleaning the pulleys.