FAT32 BPB

So I'm trying to setup a FAT32 system on a custom bootloader, to replace the FAT12 I was running before. FAT12 is simpler, but also outdated and unable to handle larger disks. I'm trying to boot from a Kingston 8GB DataTraveller.

After pouring over the MS documentation and any other resource I can find, this is my best shot for a BPB:

Code:

;FAT 12/16/32
bpbOEM                  DB "MSWIN4.1"
bpbBytesPerSector:      DW 512
bpbSectorsPerCluster:   DB 1
bpbReservedSectors:     DW 1
bpbNumberOfFATs:        DB 2
bpbRootEntries:                 DW 0
bpbTotalSectors16:      DW 0
bpbMedia:                       DB 0xF8
bpbSectorsPerFAT16:     DW 0
bpbSectorsPerTrack:     DW 0
bpbHeadsPerCylinder: DW 0
bpbHiddenSectors:      DD 0
bpbTotalSectors32:     DD 15148608

;FAT32
bpbSectorsPerFAT32:     DD 118348
bpbExtFlags:              DW 0
bpbVersion:               DW 0
bpbRootCluster:         DD 2
bpbFSInfoSector:        DW 1
bpbBackupBootSector: DW 6
bpbReserved8:           DQ 0
bpbReserved4:           DD 0

;FAT 12/16/32
bsDriveNumber:          DB 0x80
bsUnused:               DB 0
bsExtBootSignature:     DB 0x29
bsSerialNumber:         DD 0xa0a1a2a3
bsVolumeLabel:          DB "BOOT USB   "
bsFileSystem:           DB "FAT32   "

When I do this, my computer (Windows 7) stops recognizing the USB stick and tells me it's not formatted. So obviously it's not right. But I can't figure out the mistake. Is anyone here familiar with FAT32 enough to help? Thanks!