I attempted to upgrade from 5.1-7-E1 to 6.0-5-E2 using the file IPS-K9-6.0-5-E2.pkg. Doing a debug module boot command shows the file transfer and it eventually goes to the unresponsive state. I then imaged it to 5.1-8-E2 and it took the image. From here I tried to go to 6.0-5-E2 and it failed again. I've used the same file image twice to upgrade other SSM's with no problems. I tried transfers via ftp and scp and http using the IDM software. Any Ideas?