OK. Thanks. Looks like the performance file might be to blame. I'm not sure, but it looks very suspicious (and illogical) to me:
Replace the values marked in bold to something more sensible:
[Team #09]
Name=Sauber,Ilmor
Performance=680,760,4500
First Driver=29,Karl Wendlinger,14590,700,15400,1000,AT
Second Driver=30,J.J. Lehto,14590,700,14400,
15400,FI
[Team #10]
Name=Larrousse,Lamborghini
Performance=710,780,4500
First Driver=19,Philippe Alliot,14690,500,13400,1000,FR
Second Driver=20,Erik Comas,14690,500,13200,
12000,FR
A value of 1000 will do.