Can't upgrade 12.0.22

When I try to upgrade to What happens is I select the download and install, then click process. FreePBX shows:
Downloading and Installing sysadmin
Downloading sysadmin 276099 of 276099 (100%)
Installing sysadmin

And then sits there for ever. Does not ever seem to change. I have waited in the past over an hour, with no change. Any ideas what is going on here!!