Real flight lite locks up

haveing a problem real flight lite locks up after a short time no fixed time have got the latest drivers for my vidio card and sound card the screen locks up bu the sound continues any one help out there

when it runs its good


System: Windows Me (4.90, Build 3000)
Processor: AMD Duron(tm) processor, MMX, 3DNow, ~800MHz
Memory: 768MB RAM
DX Version: DirectX 9.0a (4.09.0000.0901)
Video Card: 3D Prophet 4000XT
MFR: Hercules
Version: 4.13.0001.6270 (English)
Date: 9/27/2002 16:20:58, 66848 bytes
CD-ROM (G YAMAHA CRW4416S (1.0j)
CD-ROM (E YAMAHA CRW4416S (1.0j)
CD-ROM (E YAMAHA CRW4416S (1.0j)
CD-ROM (H TEAC CD-ROM CD-532S (1.0A)
CD-ROM (F TEAC CD-ROM CD-532S (1.0A)
CD-ROM (F TEAC CD-ROM CD-532S (1.0A)
CD-ROM (F ATAPI 44X CDROM (3.30)
CD-ROM (E ATAPI 44X CDROM (3.30)
Installed in: C:\Program Files\RealFlight
Free Disk Space (C : 23773 mb free


Control Panel Version: 2.00.292
LPT Interface Version: Not installed
RealFlight G2: 2.00.592