Hello! I've just purchased teh 737NG PACKAGE, and tried to install it in my FS9 (it

Make sure you are not using a cheat that eliminates the need to insert Disk 4 to run FS9.The pmdg user downloads section has a 737 removal tool that you could try just to make sure all parts of it were removed.If this doesn't help, send a message to pmdg support and make sure you get an automated response.

Thanks for yor advise downscc!!!I tried the 737 removal tool but nothing happens. But I use a crack that is a new fs9.exe file, to avoid the use of the CD4 each time I run the FS.So may be, this is the problem!!.... but how could I revert to the original fs9.exe file without re-installing fs9??... I mean, without installing fs9 again because I've to many addons specially for my virtual airline, that some of them are not available anymore....Thanks for you help!

I could get the fs9.1 exe and fix the prblem, because the installer program from PMDG reads the version from de fs9.exe file, and although I had the new version this archive kept the old!! one!Thank you!!!