su: Sorry when in wheel group

[AbsolutePen]

Hi,
I have problem with su command. I am in group wheel but when I try to su I get su: Sorry.
I restarted my server.
This is output of id command:
uid=1001(freebsd) gid=0(wheel) groups=0(wheel)

I don't have any idea what I can do.

 

[covacat]

is the root account somehow borked ?

 

[Kai Burghardt]

There are three LOC in /usr/src/usr.sbin/su/su.c containig Sorry. They are all preceded by an invocation of syslog(3) that tell you where to look next.​