My pendrive can detect but it appear please insert dsk into drive

I) this is trick i followed with my pen drive, if you an windows xp cd, insert it in ur computer and restart ur computer(follow the procedure of formating ur system or reloading OS, where u will get message "press any key to boot from cd....), make sure that ur pen drive is inserted when u are restarting ur system, 

ii) i'm not going to format ur system, when u get message(to fromat in C press Enter or ESC), at this point of time u press ESC and will see all ur partition(harddisk, like C, D, E.....)and u will even ur pendrive partition separtely a


iii) and now highlight or select ur pen drive partition and press key D to delete partition and follow instruction ....after completing this deletion process, again press C to create partition........
and ultimately come out  them by pressing ESC and this will prompt "whether u want to  abort formating ur system, say yes..........Enter and normally continue ur operations in ur system...

iv) if u are familiar formating ur system u can do this very easily(note: i'm not formating ur system)

Thanking you

M. Sridhar