weird, i haven't seen that issue before specifically; you clearly have dba rights to take it offline and online, so that's not the issue, especially since it's available afterwards.
I have seen weird things when you use things like the 2005 verison of SSMS to conenct to a 2008/R2/2012 server; the SMO is older and sometimes doesn't support; can you check your SSMS client version and see and see if it's older than the server you connect to?
Lowell