PPCGeeks - S2U2 incoming call question

First of all hello, first post here.
Secondly, and i appologize if this has been covered, i have a question on the S2U2 program. I love this app and really want to use it, the problem is that i keep the screen of my TP off/dark to save on battery power, and when i get an incoming call my TP lights start blinking to alert me there is a call, the screen comes on, shows the S2U2 screen and then the screen to either answer call or not. Problem is by the time i'm given the option to answer the call it has already gone to voicemail. I don't have any problems when not using S2U2 so i'm guessing the fact that calls don't ring very long and get directed to voicemail is due to the S2U2 program. I HAVE the Caller ID feature turned OFF but i'm still having issues.

Does anyone know of a way to use S2U2 and still have enough time to answer the incoming calls, as i don't want all my calls to be sent to voicemail? I hope someone can help because if not, i'm affraid i won't be able to use this app.

Additional info, i'm using a Sprint phone with stock rom. The S2U2 program appeared to install perfectly and i can navigate thru all the menus and change settings, i just don't or am not given enough time to answer incoming calls.

Thank you.