Error Upgrading from 1.3 to 1.6

Hi, I have a couple production websites that are still running version 1.3.
I didn't upgrade them because I manually made the changes I needed (which you ended up doing in subsequent version anyway).
Since my hosting provider has not yet installed .NET 4.0 (and doesn't plan on it anytime soon) I was planning on upgrading it to version 1.6 instead of 1.8.

However, I get the following error:

Upgrade script from your version '1.30' to '1.60' is not available

Do you know a workaround for this?

Is there something I can do to fix this? Maybe upgrade one version at a time?

Any help would be greatly appreciated.

Thank you

Correct. You have to upgrade one script at a time.

you might have to download the code from v 1.6   to get the earlier upgrade scripts you need though

- hayden