I bought my Galaxy Ace yesterday, and I've already started encountering problems. When I attempt to connect to Kies, I am now getting an error message saying "Cannot start service on the device. Please disconnect then reconnect device", despite it working perfectly last night. Also, it doesn't detect my SD card, despite it obviously being in there. In the settings the option to mount it is greyed out, and if I press "files" it claims I don't have one at all. But if I press music, it states that it's busy. I assumed these problems are somehow related, as they both popped up at the same time. I really hope someone can help, this problem is really bugging me!