problem with backup exec 2010 r3 sp4 and LTO6 Media tapes

hi

we recently attched new backup library in our company , the library is HP MSL 4048 with media tapes LTO6

now , we use backup exec 2010 r3 sp4 but if you look at the media details it shows only 2.4 tb total

and if you look at media types of each tape (we have 4 inside the library there is no LTO6 media details

what i need to do and how to recognize LTO6 media tapes in the backup exec

thanks

Asaf Noiberger