Fwd: RAC on windows 2003 - 32-bit - nightmare

I have just inherited a RAC 2 node database: Using DELL Poweredge 2950 Servers with 16GB RAM and DELL power vault MD3000 SAS Storage: I have previously absolutely no experience on Windows, as Im UNIX and LINUX and as I mentioned I inherited this built.

The problem is that when both Nodes are up and running there are many problems:
1)running a 5 minute export takes 5 hours and times out - session_wait says busy_buffer

2)ora600 and ora-04031 errors on client and eventually cant log in
3)tns12170 errors intermittently when logging in
4) lots off warnings of global_cacahe_wait excessive:

When we switch one node of the performance and everything runs normally. I have been told this is the 3rd build of this system and it happened everytime.
I am suspecting the network right config right now.

Please any suggestions from you guys would be highly appreciative.

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