We're getting this abends in our production LDAP servers

Novell Open Enterprise Server, NetWare 6.5
PVER: 6.50.05

Server NW651 halted Friday, March 3, 2006 4:22:48.480 pm
Abend 1 on P03: Server-5.70.05: Page Fault Processor Exception (Error
code 00000000)

CS = 0060 DS = 007B ES = 007B FS = 007B GS = 007B SS = 0068
EAX = 00000003 EBX = FC8A7420 ECX = 4131D674 EDX = 00000000
ESI = 43FBD000 EDI = FC8A7460 EBP = 00000000 ESP = 49BC3CE8
EIP = 00320D05 FLAGS = 00010286
00320D05 8B6D00 MOV EBP, [EBP+00]=?
EIP in SERVER.NLM at code start +00117185h
Access Location: 0x00000000

The violation occurred while processing the following instruction:
00320D05 8B6D00 MOV EBP, [EBP+00]
00320D08 C1E005 SHL EAX, 05
00320D0B 8D9580020000 LEA EDX, [EBP+00000280]
00320D11 01D0 ADD EAX, EDX
00320D13 8B10 MOV EDX, [EAX]
00320D15 8917 MOV [EDI], EDX
00320D17 8938 MOV [EAX], EDI
00320D19 C7857C02000001 MOV [EBP+0000027C], 00000001
00000000320D23 8B532C MOV EDX, [EBX+2C]
00320D26 8B480C MOV ECX, [EAX+0C]

Running process: LDAP Worker Process
Thread Owned by NLM: NLDAP.NLM
Stack pointer: 49BC2C78
OS Stack limit: 49BBE8C0
Scheduling priority: 67371008
Wait state: 3030070 Yielded CPU


I've not found nothing in Support that could help me...