[Q] Xperia M Dual C2005 Custom kernel topic

Hi guys,
I have Xperia M Dual C2005 with 4.3 Android 15.5.A.1.5. Kernel: Linux 3.4.0. When i trying to install a custom kernel "[KERNEL][DEC21]ElixER-3.2 ll [XM-DUAL] ll [PERFROMANCE ++] ll" everything looks perfect... but after that, my SIM card cannot be recognized by phone... i don't know what to do. Any ideas? Sorry for my english :)