problems with usb

hi
since i installed windows 7, with a new board:
amd phenom x2 -3-2 oveclocked at 3,8 with a good cooler
asus m4a785td-m-evo
4 gb ram corsair 1.333 mz
vga gygabyte 5770 1 gb
hdd 1 tb western digital 64 cache
power supply lc power 700 watts
case from nox
All updates done, all drivers installed, last bios update done
i have several pens , i put the pen it appears the menu scan and fix or continue, at this point the logical drive appears, but after i click on continue, it dissapears,and appears a drive with a cd and i cant do nothing.
i use on my job, and i noticed that it seems that on seven it always do the same, and on others Operatings sistems it works fine.
I bought another pen from emtec with 32 gb ,the firts time it worked fine, it let me put the files on it , but after that its the same.
I use kaspersky internet security and i havent any virus.
I tried on back painel usbs and on front usbs
can you help me