Stupid NFS question

[Lei Miao]

While attempting to mount an NFS file system, I got the following
error... 

mount clntudp_create: RPC: Program not registered   

Could someone tell me what the problem is... I guess it's got something
to do with portmap.. but it's running on both machines (ie. the one where
the file system resides and the one to which the fs is to be mounted).

It was working fine before and after a reboot of the dest machine, it
stopped working.

Many thanks,
Lei
PS: could you CC your response to [EMAIL PROTECTED]