You may have a problem with the charger as far as we know. The fastest way to check the battery is to use a volt meter and see if you have 12 volts or more. Your issue is the blinking SXXXXX XXXXXght that is causing the vehicle to not start. Now about the no start. Are you saying that the starter isnt even turning the engine over or that it turns over but never starts running. The SKIM system is designed so that if the wrong key is used, the engine will start and run for about 3 seconds then cut off. This will happen up to 3 times and then the system will disable the starter. Please if you can, discribe in detail the eaxact issue you are having and if possible please send the VIN number so that I can make sure it doesnt have SKIM.
Okay , it sounds like the battery may be dead. It may only have enough power to cause the light to blink. Other items you can check to be sure is to see if the interior lamps come on when opening the door, does the radio work with the key on, does the horn sound and if so does i sound normal. These 3 items are not related so if they all 3 are not working properly then the battery is most likely dead. This could explain why the battery charger is not working correctly. If the battery is bad and not just dead, the charger will never be able to charge it. If the above 3 items dont work then I would recommend taking the battery out and having your local parts store such as auto zone check it for free. And if need be replace the battery. If you have access to a pair of jumper cables you could hook up to your vehicle and see if the headlamps now work as well as the other items. Then hyou could actualy try to start it. If the battery is truely bad, it may be difficult to start even when jumping it. Try these items and follow the directions I gave if the 3 items are having issues. Let me know what you find. I am on the east coast and its 12:45 am here and its way past my bed time. I am going to have to check for your reply tommorrow when I get the chance. Keep in mind that the battery could have gone bad because it is old or has internal problems or the battery could be dead because of leaving the headlamps on or the inside lights on. Just let me know what you find Felicia and I will check back tommorrow. Good night.