linked servers force named pipe

Hi,

I use the following syntax to create a linked server with named pipe protocol :

@datasrc=N'np:MyCollectivePI'

The test connection to the linked server failed... 

OLE DB provider "PIOLEDB" for linked server "TEST" returned message "[PI SDK] the requested server was not found in the know servers table. np:MyCollectiveP.

The syntaxlooksgood to me, i think that theproviderdoes not supporttheprotocolis forced...

Thank for help me

Thank for helping