help using nexus root toolkit

[AC Question]

I'm trying to update my phone because the normal update file is corrupt. Android won't let me re-download it so I had to wipe the cache partition. Now it won't install because the file is missing but the system thinks its there. What mess...

So I'm trying to make ntr do the update. I go thru all the normal steps and it does all the work but never updates anything?

I have the nexus 5.1.0 installed and I just want to update it to anything above. I tried 5.1.1 and here is the log

Flash Stock + Unroot [WugFresh Development]
------------------------------------------------------------------

target didn't report max-download-size
sending 'bootloader' (2264 KB)...
OKAY [ 0.075s]
writing 'bootloader'...
OKAY [ 0.284s]
finished. total time: 0.361s
rebooting into bootloader...
OKAY [ 0.002s]
finished. total time: 0.002s

< waiting for any device >
target didn't report max-download-size
sending 'radio' (45537 KB)...
OKAY [ 1.442s]
writing 'radio'...
OKAY [ 2.491s]
finished. total time: 3.934s
rebooting into bootloader...
OKAY [ 0.002s]
finished. total time: 0.003s

Creating filesystem with parameters:
Size: 587202560
Block size: 4096
Blocks per group: 32768
Inodes per group: 7168
Inode size: 256
Journal blocks: 2240
Label:
Blocks: 143360
Block groups: 5
Reserved block group size: 39
Created filesystem with 11/35840 inodes and 4616/143360 blocks
< waiting for any device >
target didn't report max-download-size
erasing 'cache'...
OKAY [ 0.041s]
sending 'cache' (10984 KB)...
OKAY [ 0.350s]
writing 'cache'...
OKAY [ 0.593s]
finished. total time: 0.984s

rebooting...

finished. total time: 0.001s

Can anyone help me figure out what is the hold up here?