can't change settings.

[shadd_wulf]

I made a search but couldn't find anything that really helped me. I'm running a diamond on mighty rom and when i download cab files like the finger keyboard, but whenever I try to change my settings to either use the new keyboard or to put the phone in landscape mode instead of portrait it never works. it lets me change them but as soon as I leave that screen they go back to default. I'm new to the whole diamond thing so please be gentle if this is something really easy to fix.