When you say you upgraded to 6.2.x please tell us that you did it following the steps outlined in the WIKI and mentioned in any number of posts on this forum ... 

http://www.dotnetnuke.com/Resources/W...

Any other upgrade steps will most likely results in any number of issues ... there have been a huge number of updates to the dnn platform since 4.9x including two major transitions of coding and platform.

I would strongly suggest you roll back now to your 4.9x backup and redo the updates in the order outlined in the wiki if you have not done so previously - it is highly unlikely that you will be able to work yourself thru to a fully functional system with these steps.

You should also verify that your site is running correctly after EACH upgrade stage -  especially at the 5.6 stage before the transition to c# and asp.net 3.5

westa

1st ERROR
00:00:00.203 -   Executing Script: 05.00.00.SqlDataProvider Error! (see 05.00.00.log.resources for more information)

Log SAYS:
System.Data.SqlClient.SqlException: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.

2nd ERROR
00:00:13.703 -   Executing Script: 05.01.00.SqlDataProvider Error! (see 05.01.00.log.resources for more information)

Log SAYS:
System.Data.SqlClient.SqlException: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.

Before i continue to the next upgrade path of 5.0.6.08, HOW do i fix these errors so that they do not continue through the next upgrades?

How do i fix: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Please advise before I continue...
Thanks