After clicking Play, program exists

[MeridanRebel]

I just installed Regnum, and whenever I click on Play, I see a window pop up real quick and then exist. I'm running Ubuntu 7.04. This is what the log.txt has:

[RenderizerGL][renderizer_gl_x11.cpp(158)] X Server vendor: The X.Org Foundation
[RenderizerGL][renderizer_gl_x11.cpp(162)] X Server release: 7.2.0
[RenderizerGL][renderizer_gl.cpp(330)] Got a 24 bit visual (36) with a 24 bit depth buffer
[RenderizerGL][renderizer_gl.cpp(358)] Resolutions: 1280x1024x32 1024x768x32 800x600x32 1280x960x32 1280x800x32 1280x768x32 1152x768x32 
[RenderizerGL][renderizer_gl.cpp(380)] OpenGL vendor: Tungsten Graphics, Inc.
[RenderizerGL][renderizer_gl.cpp(381)] OpenGL renderer: Mesa DRI R300 20060815 AGP 1x x86/MMX+/3DNow!+/SSE TCL
[RenderizerGL][renderizer_gl.cpp(382)] OpenGL version: 1.3 Mesa 6.5.2
[RenderizerGL][renderizer_gl_extensions_loader.cpp(204)] Detected OpenGL extensions: GL_ARB_fragment_program, GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_texture_compression, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_rectangle, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_EXT_blend_func_separate, GL_EXT_draw_range_elements, GL_EXT_secondary_color, GL_EXT_separate_specular_color, GL_EXT_stencil_wrap, GL_EXT_texture_edge_clamp, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod_bias, GL_SGIS_generate_mipmap, GL_SGIS_texture_lod
[EventImportBase][event_import_base.cpp(74)] Toplevel widget not assigned
[EventImportBase][event_import_base.cpp(74)] Toplevel widget not assigned
[EventImportBase][event_import_base.cpp(74)] Toplevel widget not assigned
[EventImportBase][event_import_base.cpp(74)] Toplevel widget not assigned
[EntitySystem][entity_system.cpp(104)] Entity system ready to shutdown
[Game][game_client.cpp(660)] Exiting Game

Any ideas? Thanks.