SQL Server backup to SMB-server fails

I have one W2K and a W2K3 server.
I run SQL Server on both.
I want to place my backup's on a Samba (SMB) share on HPUX.
I have a network connection present.
I cannot "copy con" on this share (or subdirectory)
The above action gives a 995 (The I/O operation has been aborted because of
either a thread exit or an application request.) error.
I cannot get SQL Server Enterprise Manager to accept the network connection

Please advise!


J.A.R. Karremans