Windows 2003 R2 x64 intermittently hangs

[Guest dadoolittle]

New Windows 2003 R2 x64 server, Quad core proc, 12gigs ram, dual HBA fiber

attached SAN storage. 3 SAN data volumes (2 - data volumes and 1 for user

folders, mapped to look like one share). Server will suddenly seem to stop

responding, sort of. Very slow browsing of the mapped drive. Server is

still responding, and RDP to it, and open both data drives, but cannot open

the use folder volume. No errors are generated. Very little to no disk

activity in perf mon.

There are no errors on the server, and no errors in the SAN storage system

(which is also brand new). We have a duplicated system (same server and SAN

system) as we were planning for an offsite DR and DFS sharing system, we

replicated the data to the other server/SAN, and the same problem occured.

Anybody got any ideas?????