ok guys, thanks both for your help!
DonManfred: yes, you are right.. I was using different themes
sorry If I'm asking something obvious.. I have not much experience on mobile app, yet
btw, I found this two differences between manifest from both apps
app 1:
<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="14"/>
app 2:
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="14"/>
SetApplicationAttribute(android:theme, "@android:style/Theme.Holo")
can explain to me what do mean this, and how it impact on diffent phones?
sdk android:minSdkVersion="5"
what info should I looking for? or where? (also about the themes)
thanks!