Big problem with cc-line

Hello everybody!
I'm trying to modificate the 1988 Hockenheim circuit with Gp4 Builder 1.540 and I've a problem:
When I change the Radius of a Section, the next Section is uncorrect. If I put 0 for Radius I see a huge horizontal line and I'm obliged to modify the values but it's impossible to get a straight.

Can you help me? Is my first attempt with circuits and until now was funny :D

Changing a cc-line will affect all cc-line sections after the changed cc-line. As a result you shall adjust those following cc-line sections to get the direction all right again.

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My Grand Prix 4 Files
I'm a total dick. How many people can say that?

Thanks Turbo Lover.
I've rebuilt the entire cc-line and now I've the straights but I still have some problems, now every corner has an absurd angle.
I've so much to learn

I hope that none will hate me for all of those stupid questions...
I've read a guide and it said ". To open both .gp4 and .dat at the same time, just open the .gp4 and the .dat will automatically open with it." if the files are in the same folder

Why that doesn't happen to me? It's because I've modified the dat file?

Heeeelp! :D

Don't rename .dat file and/or .gp4 files else pairing couldn't be done to load both files.

You mean the original names? So, for hockenheim is S1CT12.dat and hockenheim2001.gp4 right?

Thanks so much Lo2k! Now I just have to understand how to modify the .gp4. Thanks a lot!!

You're welcome