cannot change a member's avatar

[bozzy]

I turned off the ability for members to choose their own avatar, they'd have to subscribe for that, and i want to add an avatar for a member who hasn't subscribed (they won a contest, lol)...

I went to that member's user options, went to the change avatar section, selected the avatar from my computer, and clicked 'save'. It did not show the successful message after that, there was no message, just a blank screen, and the avatar was not uploaded.

Do you know what's goin on?

Thanks