Can somebody help me....

Sometimes when the server loads it will load the CFIS with
and other times it will load with \\servername_w

Also, I'm unable to access the configuration in iManager. When I click
on CIFS, i get a blank screen, and if I click on it again I get the
following error:

Service unavailable: Exception thrown in call to getCIFSMainPageData
method on nss.CIFS