[Centos] Cannot access windows machine on network from newly installed Centos4 workstation

[cburnat at burnat.com (chris burnat)]

 From a Centos4 workstation, I can see all machines on the network, but 
can only access shared resources from other linux systems - share have 
been established using Samba.   I can see all windows systems OK, but 
cannot access windows shares - I get "you do not have the permissions 
necessary to view the contents of "Windows Network: dawxp".  The network 
consists of a Workgroup with a mix of RH7 based servers (SME),  Win2000 
and WinXP pro workstations.    Any assistance would be very appreciated, 
I am stumped...  regards.  chris