strange behaviour, No files in MSC or MTP mode but on root

Hello there all, I have a sansa 8gb clip, I have not used s/w that came with sansa but instead regular modes to put files on it. the thing is if I switch on MTP mode I have put differnt files I can see, If i go MSC mode Ihave differnt files, both visible in respective mode on Vista, HOWEVER, I have bunch of files I have put on which are not visible on either mode in VISTA but i know they are there.

I have used Ubuntu to put these files on ROOT directory and I can access them and use them  there. is there any other mode that is not usuable in Vista ? I will boot up ubuntu in minute and see what files are there.