Mine is sporatic, it's driving me nuts. Sometimes I login and I get the correct presence of myself. I can change from DND to away, etc, idle works, etc. Somewhere in the night, it started to work on its own. I played around with it this morning and it was working. (could not see other status though.) I logged out and logged back in, now it's offline.
ASA is believe is 8.04 SSL vpn. I tried with IPSEC also and not much luck either.