every time i start up any custom battle ,it CTD's at the start deployment

17:51:35.230 [system.rpt] [always] CPU: SSE2
17:51:35.230 [system.rpt] [always] ==== system log start, build date: Feb 25 2008 version development ===
17:51:35.230 [system.io] [always] mounted pack packs/data_0.pack
17:51:35.230 [system.io] [always] mounted pack packs/data_1.pack
17:51:35.230 [system.io] [always] mounted pack packs/data_2.pack
17:51:35.240 [system.io] [always] mounted pack packs/data_3.pack
17:51:35.240 [system.io] [always] mounted pack packs/data_4.pack
17:51:35.240 [system.io] [always] mounted pack packs/localized.pack
17:53:12.372 [system.rpt] [error] Medieval 2: Total War encountered an unspecified error and will now exit.