Ireadmail not working

Hello,

I have install iredmail 0.9.0 with sogo on ubuntu 12.04 server.But not working iredmail .
start apache2 service geeting error sogo :
[Tue Mar 17 11:11:57.116919 2015] [proxy:warn] [pid 21313] AH01146: Ignoring parameter 'retry=60' for worker 'http://127.0.0.1:20000/SOGo' because of worker sharing
[Tue Mar 17 11:11:57.116984 2015] [proxy:warn] [pid 21313] AH01146: Ignoring parameter 'connectiontimeout=5' for worker 'http://127.0.0.1:20000/SOGo' because of worker sharing
[Tue Mar 17 11:11:57.116992 2015] [proxy:warn] [pid 21313] AH01146: Ignoring parameter 'timeout=360' for worker 'http://127.0.0.1:20000/SOGo' because of worker sharing

So Please help.