Default Apktool for android

Ok here is my phone setup:
HTC one sv
S-off
Supercid
Supermid
Aos is 4.1.2
My problem is I'm trying to decompile make changes and recompile apk/odex files ie.....
Framework.apk
Framework.odex

It seems to decompile ok but when recompiling I get this message:

W: could not find resources

when recompiling the apk

I'm trying to change the sdk values
I have apktool installed on my internal sd card.
Am I doing something wrong or is there something else I need to add/do


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