Can you please describe the problem in more detail? What happens when you press the home button?
Just saying 'x doesn't work, help' won't help anybody. Thoroughly explain your problems so we can diagnose and then help.
Sent from my C1905 using XDA Premium 4 mobile app
My Phone: Sony Xperia M C1905 | ROM: Modified Stock | Base Firmware/Build Number: 15.4.A.0.23 | Android Version: 4.3 | Kernel: Stock (Permanently Locked Bootloader) | Network: GiffGaff
My Tablet: Google Nexus 7 (2012) | ROM: CM11 | Base Firmware/Build Number: 11-20140527-NIGHTLY-grouper | Android Version: 4.4.4 | Kernel: CM11 | Network: N/A