Can't change Time Machine backup disk

[ch19251]

Hi, running OS X 10.5.6 on a macbook. I have been backing up using time machine to my Time Capsule, but would like to start backing up to a firewire drive. When I open up the Time Machine preferences and click change disk, nothing happens. The googles have revealed nothing.

 

[fryke]

Hm. Never heard of such a thing happening. It's not that the system preference is simply locked, right?

 

[ch19251]

Ah, I wish it was that simple, the lock is unlocked.

 

[sausagepotato]

(bumping old thread instead of making my own)
I've also been having a similar problem for the past few months. When I click on "Change Disk", nothing happens. Any help would be greatly appreciated.

I'm currently running OS X 10.5.8

 

[djackmac]

Are all of the drives showing up in disk utility? Are all formatted as HFS+?

 

[sausagepotato]

Yes, all the drives show up in disk utility and are formatted HFS+. Time Machine backups fine with my current external hard drive, but I want to use a different external hard drive and it won't let me "Change Disk".