unable to start micasad and afptcpd services

When I started AFP service, it said it started but when I checked the
status, it is not.

The log file says:
afptcpd [16460]: Failed to read proxy user credentials. Ensure CASA is
running and AFP casa entery is updated. Error: -803
afptcpd [16460]: [debug] failed to obtain AFP proxy user credentials (1)
<1>. Check proxy user in casa store
afptcpd [16460]: unable to authenticate with AFP proxy user 1 <1>

I tried to reconfigure AFP proxy user by typing yast2 novell-afp. But I
still can not start micasad service or novell-afp service.

I would appreciate it very much if someone can give me some advice on
where I should look at the above issue.

Thanks a lot!