Hi,
Try these steps.
Start > Programs > SqlServer2005 > ConfigurationTools > SQLServer SurfaceArea Configuration >Click Surface Area Configuration For Services and Connections > Click Remote Connections > Click Local and Remote connections and within that Select Using both TCP/IP and named Pipes > Apply > Ok...
Hope this helps....:)
Best Regards,
TALIB ALI KHAN
MCTS
http://www.onlineasp.net