When trying to upgrade CB 1.23 to 1.31

1. Using Install/Uninstall
---Received following error---
*JFolder::create: Could not create directory
* Warning! Failed to move file.

2. Enabled FTP layer and attempted install again
---Received following error---
"Unable to find install package"

3. Third and subsequent install attempts
---Received following error---
"JFTP::mkdir: Bad response"

Please help ASAP