ok, it's a custom anim issue.
I remember Zayfod had the same problems with his rappel script in MP.
That rappelscript uses custom anims too.
He solved it (or was it Snypir?), so I take a look at his script when I'm home.
I can't promise you anything , cus I don't know shit about MPscripting.
The thing is, I can't test missions in MP, because I have only one PC and I don't even have the internet at home, only at work.
Anyway, I'll send an email to Zayfod, AFAIK he's in the ECP team now, so he could be very busy atm.
Thx for being a good betatester btw