Application is not installed message
This occurs when the app is installed on the storage card, but the SD/storage card later becomes unavailable. This may occur when the SD card is removed or corrupted, or when the phone is connected to a PC in disk mode.
Please ensure that your SD card is inserted properly and that your handset is disconnected from the PC while using the app. If this does not resolve the problem, restart your handset then uninstall and re-install the application through Google Play Store.