Default Power problem with Helmi BA WM2k5 AKU3.0 Beta v.1.1 Rom

One of my problems is :
sometimes when the power is off in my B.A. i cant turn it on by pressing power button I had to reset
and when it is off i cant receive any call because it is not ringing and I donít know if there is a call so I missed a lot of call lately that I donít know about
please can any one help me with that