sony ericsson c903 help!?

madmoo

New member
i bought the sony ericsson c903 yesterday and im a bit confussed .
1.ive been using the apps like skype and msn
and some times when i try and open up my contacts it says "locked my other application can open contact now " so i cant see my contacts and it only allows me to open it up sometimes?
2.when i slide it closed about every 20seconds it lights up again? why ?
somebody help me!
oh and i end all applications
 
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