Another option is to check DNS for short and long name resolution. From another system, try pinging based on short name, and based on long / FQDN and see if it works. If not, then you've some holes in your DNS configuration. Granted, the LMHosts can make up for it, but then again...
You CAN change the F drive mapping to use IP or ... whatever. Just go into BootWiz and modify it to work.
MOST of the time, this is a DNS issue as Andy said.