I'm playing a multplayer game with 4 of my own characters. After several attempts, I finally took out the pack of beholders in the 'Eyeless One' quest, but one of 'my' characters was stoned or frozen in some way. I was a bit busy and didn't see the message as to what exactly hit her, but it removed her from my group and now there's a 'statue' of her standing there.

Anyway, she had my 'stone to flesh' spells so I had to leave to get a scroll. I got back there and although she's there, I can't target her with the scroll and nothing else seems to help.

Thank you in advance for any suggestions you may have.

Sorry but she's gone forever!!!
Multiplayer characters that get stoned often don't come back

if you have a save from before load it, export the char
load your current game again and import her
if you now drop the scroll and vow never to ouch it again
it is almost as if you had unstoned her (to get rid of the evidence smash the statue)

No way back, try loading a previus game and doing all again!