Getting error on our NT 4 SP6 server running the ASE 12.0

The 'WeriteFile' call failed for device 'd:\program\pccnuew0.dmp' with
error number 1453 <Insufficient quota to complet the requested service>.
Refer to your operating system documentation for further details. Look for
'Apr 23 xx:xx:xx 2001: D00: SYBMULTBUF ERROR:' in the backup server
errorlog for addtional information from SYBMULTBUF.
Msg 8009, Level 16, State 1:
Server 'BETASERVER', line 1:

Help if you have any suggestions.
The backup server is running in ASE.

Services are also running.

???

Thank You

-Brett