Assembly Coder can you decipher this fault ?

apearently one of these tasks which are running is causing a fault in a pbcl.dll

*----> Task List <----*

0 System Process

4 System

616 smss.exe

664 csrss.exe

688 winlogon.exe

732 services.exe

744 lsass.exe

944 svchost.exe

1012 svchost.exe

1108 MsMpEng.exe

1144 svchost.exe

1236 svchost.exe

1328 svchost.exe

1520 spoolsv.exe

1912 Explorer.EXE

228 CTDVDDET.EXE

236 VolPanel.exe

252 tfswctrl.exe

268 msseces.exe

276 ctfmon.exe

364 svchost.exe

456 CTsvcCDA.EXE

536 svchost.exe

1052 svchost.exe

1556 CTXFISPI.EXE

1460 nvsvc32.exe

1568 svchost.exe

1628 PnkBstrA.exe

2020 svchost.exe

2080 svchost.exe

2200 fxssvc.exe

3632 alg.exe

3048 iw3mp.exe

2248 PnkBstrB.exe

608 drwtsn32.exe

function: pbcl

1e202f32 47 inc edi

1e202f33 1ce9 sbb al,0xe9

1e202f35 8608 xchg [eax],cl

1e202f37 0000 add [eax],al

1e202f39 5f pop edi

1e202f3a e9abfcffff jmp pbcl+0xd2bea (1e202bea)

1e202f3f 8b0c24 mov ecx,[esp]

1e202f42 56 push esi

1e202f43 54 push esp

1e202f44 e9f4f9ffff jmp pbcl+0xd293d (1e20293d)

FAULT ->1e202f49 ff32 push dword ptr [edx] ds:0023:1e34affe=????????

1e202f4b e9fee3ffff jmp pbcl+0xd134e (1e20134e)

1e202f50 8b2424 mov esp,[esp]

1e202f53 668b0424 mov ax,[esp]

1e202f57 81ec04000000 sub esp,0x4

1e202f5d 890424 mov [esp],eax

1e202f60 89e0 mov eax,esp

1e202f62 0504000000 add eax,0x4

1e202f67 0502000000 add eax,0x2

1e202f6c e9e9120000 jmp pbcl+0xd425a (1e20425a)

1e202f71 8b1c24 mov ebx,[esp]

were do i begin to isolate this ?