Labivew 8.2.1 is locking up - labview

Hi Everyone,
 
I was wondering if anyone has seen a simular issue to what I'm seeing now. I have a fairly large app thats running on Windows Server 2003 (I've also ran it on XP and had the same issue). Periodicly the app locks up. It will go for days on end without any problem and then it starts locking up two or 3 times in a 24 hour period. We were orginally running the program on XP but transfered it to a server (both hardware and software upgrade) because we though that a more stable machine would help. Typically the CPU ussage is around 30-40% on XP but once in a while it would go up to 90-100% for a few hours to a couple of days.
 
The app monitors a station and must run without locking up. It currently is talking to a RSlogic OPC Server, Kepware OPC Server, Modbus and a cRio. I have 12 or 15 IO Servers to connect to the different servers (OPC and Modbus). I'm also using Win911 to aleart the operators of alarms, which is connected to NI's OPC server. I'm loging all the data to a citradel database, which is the root cause to the extreme CPU ussage, but I'm not sure about the Locking up. Most of my code is fairly simple thanks to the DSC package and shared varibles so I don't think it's a problem with that.
 
Has anyone seen anything simular to my problem? Any posible ideas I can try? I'm at the point were I'm starting to think that labview (and the DSC package) just can't handle everything I'm trying to do. I have 4 other stations set up the same way running Wonderware on a XP machinie without any problems.
 
Thanks in advance for any comments on this problem
Matt