Palm Treo 700w / 700wx

1.) When I am on a call and I get another call the first call is put on hold but when I switch back the other line doesnt disconnect it just sits on hold. Am I doing something wrong?

(2.) During the day if I dont use my phone for an hour or two it will "freeze." By freeze I mean the screen wont turn back on. Is this a function of the settings that I need to change or just a Windows crash error?

Thanks all.