Not really my field but I did find this:
Registry Location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Netbt\Parameters
Key: DhcpNodeType
Value Type: REG_DWORD - Number
Valid Range: 1,2,4,8 (B -node, P-node, M-node, H-node)
Default: 1 or 8 based on the WINS server configuration
Description: This optional parameter specifies the NBT node type. It is written by the DHCP client service, if enabled. This parameter determines what methods NetBT uses to register and resolve names. A B-node system uses broadcasts. A P -node system uses only point- to-point name queries to a name server (WINS). An M -node system broadcasts first, and then queries the name server. An H -node system queries the name server first, and then broadcasts. Resolution through LMHOSTS and/or DNS, if enabled, follows these methods.
If this key is not present, the system defaults to B -node if there are no WINS servers configured for the network. The system defaults to H -node if there is at least one WINS server configured.
By the way, there is another optional parameter at the same registry location that you (or a helpful Net Administrator) may add which will override any DHCP server value placed in the DhcpNodeType.? If present, check that the value of this parameter is correct as well.
NodeType
Key: Netbt\Parameters
Value Type: REG_DWORD - Number
Valid Range: 1 - 8
Default: 1
Description: This parameter specifies the NBT node type. It is an optional parameter that, if present, will override the DhcpNodeType parameter. See the entry for DhcpNodeType above for a complete description.
MS KB Article:
http://support.microsoft.com/?kbid=160177
Hope it helps.....