Thanks for all thoes replying very quick.moemo cummunity is really active ..about renaming a file i think there is some problem with my x terminal let me tell u in detial...i opend xterminal "~ $" is shown (i do not know in what folder i m )then i type "cd home" ~/home $" is shown then(i put the .jpg file in home folder to renamefor testing ) then i type "mv filename.jpg newfilename.jpg" and enter ,it says "~sh: filename.jpg: not found" i also tried to type without ".jpg" i typed"mv filename newfilename.jpg"then it says "mv: cannot rename 'filename': :no such file or directory" also cannot rename the file using (inbuilt)file manager i typed the name and hit save but the name remains the same!(but in diffrent filemanager it has changed!) now i m thinking to reflash the memory or i should take to nokia care ?it is under warrnty yet