I would be very grateful for any advice from the community,

I just upgraded to DNN 5.0 ,  during the upgrade all the SqlDataProvider scripts failed.  They had an error, every other step had success except these

04.09.xx.SqlDataProvider

04.09.01.SqlDataProvider

I now have a site with some serious bugs and errors that have rendered the site unusable.  I cannot log into the site.  Content is not appearing correctly.  I do not know the correct steps to take to revert back to a previos version. 

I tested this 5.0 out locally and it was running fine, it looked really well thats why i wanted to implement it on my production web site.  Now i really regret it, i have spent 10 months working on it and its is ready to launch.  Well was ready to launch 5 minutes ago.

I know someonne out in the community knows how i can revert back to the previous version, can i delete some database entries, upload the upgrade package of DNN 4.9 and run the upgrade. 

There has to be a simple solution to this, i do not want to touch my site further until i get some advice from the experts and other users of DNN

many kind regards

you should definately restore previous backup and upgrade to DNN 4.9.1 first - and ASAP due to a security issue.

Regarding the db upgrade issues, please post the content of /providers/dataproviders/sqldataprovider/04.09.00.log and 04.09.01.log.

Due to some upgrade challenges, I suggest to wait with further upgrades for DNN 5.0.1

If you are missing content have a look at your skins DNN5 Pane-Names are casesesitive. If you have "contentPane" or "contentpane" in your skin - change it to "ContentPane" ... perhaps thats one of your probs ... most other probs are old skins w/o packages or old and 3rd party modules.

I've tested upgrading on several sites ... and would go with Sebastian ... on a production site WAIT FOR 5.01 !!! there are too many probs @the moment .. see "CanDeletePackage" on Host and so on.