First Crash :P Rook Hammer Ability

I used the Rook Hammer ability and screen suddenly went black and started hearing a beeping sound:

My first report - What information exactly should I post? My Display info from DxDiag?

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System Information
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Time of this report: 9/4/2008, 19:21:01
       Machine name: HLJS
   Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp.050928-1517)
           Language: English (Regional Setting: English)
System Manufacturer: Gateway
       System Model: GT5056
               BIOS: )Phoenix - Award WorkstationBIOS v6.00PG
          Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+,  MMX,  3DNow (2 CPUs), ~2.0GHz
             Memory: 1022MB RAM
          Page File: 341MB used, 2115MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
     DxDiag Version: 5.03.2600.2180 32bit Unicode