Problem creating downtime schedule

Problem creating downtime schedule

Hi.
 
I am using OpManager 8 (build 8052) and have an issue with the Downtime Scheduler for monitoring URLs.
 
Some of our web sites are offline from 8pm until 7am the next day so I want to schedule downtime for this time window.  However, when I set the start time to 20:00 and the end time to 07:45 it generates this error:
 
End time should be greater than start time

 
How can I get around this?  I tried creating 2 schedules, the first from 20:00 to 00:00 and then a second from 00:00 to 07:00 but this did the same thing.  I can't have the first schedule end at 23:45 as this will give me a 15 minute window where the downtime schedule won't be active, and I'll get emails from OpManager telling me the sites are unavailable.
 
Is this a bug in the software, and has anyone else encountered this?
 
Thanks,
Dave

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