Please open Windows Explorer to the location below and see if your dump file is there.
XP: C:\Documents and Settings\username\Local Settings\Temp\Sins Dump
Vista: C:\Users\username\AppData\Local\Temp\Sins Dump
If there is a minidump file present, please zip it up along with a copy of a dxdiag from your PC and a description of what you were doing when it occurred to support(at)ironcladgames(dot)com. Please note that you must provide your Sins of a Solar Empire serial number in your email to receive support (anti-piracy measure).