Now a long history.
We setup Domino 8.5.1 and Sametime 8.5 as usual. Domino works great but Sametime 8.5 not. The users try to logon using sametime client but nothing happens.
The sametime client can't connect to the server. The STPresenceSubscriptionMgr sevice doesn't start.
I try everything i Know, and check everything about Windows.
We reinstall all the environment and nothing. We setup another windows machine and it works.
I open an PMR and IBM told us that the problem was with Windows
Paulo, an engineer who works with me, found this post without a response, and today we have the answer
You have this line on Sametime.ini
STPresenceSubscriptionsMgr_VM_ARGS=-Xmx1024m -Xgcpolicy:gencon -Xcompactgc
STPresenceSubscriptionsMgr_VM_ARGS=-Xmx768m -Xgcpolicy:gencon -Xcompactgc
The problem only happens with Windows 2003 R2 with 4GB RAM. I'm reopening the PMR to know why.