Still have a CTD after deactivating Areafill

Hi,I've got a real problem with my Ground2k airport scenery. The scenery first was compiled with Ground2k V.4 and does not contain any AreaFill in the source data. But I have still many CTDs (Crash to Desktop) while using the GPS.After some weeks I've found out that without the VTP2-Roads everything was working fine. I've created new VTP2-Roads with the latest Ground2k4 V5.32 and got the same problem again (!). When using the GPS, flight simulator crashed.Well, then I just deleted the VTP2-lines and changed every "MaskClassMap" in the terrain.cfg to "0" because someone told me that could cause the problem.But now I've found out a new problem: When I fly the Learjet with GPS (actually it is the same like the Cessna has) and change the size of the GPS several times, I get a CTD again. :(Would be great if someone could give me a hint how to solve this.ThxSasa