RMAN is not identifying the Network drive (or might be permissions issue) to take archive log backup. This drive is mounted in Windows 2003 server from a Solaris server. Oracle version is Here is the error message.

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on c2 channel at 09/08/2009 17:48:53
ORA-19504: failed to create file "Z:\ARC_BKUP_08KOOBO4_1.RMAN"
ORA-27040: file create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 3) The system cannot find the path specified.
I am looking in Metalink to find something, mean time i just want to drop the post in my favorite place.

Any help is appreciated.