C702 memory card problem

[19Jeff78]

My C702 is two day old,my problem is with the memory card, its not reading my files in it although it can detect the files but it wont open pictures and play mp3s. This memory card is from my previous W880i so i think theres no problem with the mc because I tried other new memory card but still the same.Even the firmware was upgraded to R3DA029. Do you think the problem is hardware now?The thing is when you just inserted the mem card,the contents can be opened and played but after several seconds it wont be opened anymore.
To add,im not satisfied with the picture quality of this phone but thats fine as long as I have music a some photo light :D